Reddit mentions of Renew Life - Ultimate Flora Probiotic Women's Care - 50 billion - probiotics for women - daily digestive and immune health supplement - 60 vegetable capsules

Has she ever tried a change in diet (low carb/low sugar) and/or probiotics?

As for probiotics, a cheaper option are these two (they are the same brand--the difference is the first one does not have to be refigerated):

http://www.amazon.com/Natures-Way-Primadophilus-Reuteri-Pearls/dp/B000O3GCSW/ref=sr_1_11?s=hpc&ie=UTF8&qid=1414977958&sr=1-11&keywords=natures+way+probiotics

http://www.amazon.com/Natures-Way-Primadophilus-Reuteri-Vcaps/dp/B000FL9EAG/ref=sr_1_10?s=hpc&ie=UTF8&qid=1414977958&sr=1-10&keywords=natures+way+probiotics

and more expensive ones that are popular:

http://www.amazon.com/Renew-Life-Ultimate-Vaginal-Formula/dp/B0042KULCG/ref=sr_1_6?s=hpc&ie=UTF8&qid=1414978305&sr=1-6&keywords=ultimate+flora+probiotics

http://www.amazon.com/Renew-Life-Ultimate-Complete-Capsules/dp/B00CCCNISU/ref=sr_1_7?s=hpc&ie=UTF8&qid=1414978305&sr=1-7&keywords=ultimate+flora+probiotics

There are reviews there that say it cured their yeast problems.

If she is willing to try the probiotics, you should couch PIV sex for maybe a month or two and see how she is feeling on the probiotics.

If she is able to receive oral or be stimulated with your fingers (not in her vagina) without pain, then maybe ask her if you both can concentrate on each other through oral and manual stimulation while hopefully the probiotics help start to keep the yeast at bay (hopefully it will work).

The fact she can't enjoy PIV probably lowers her sex drive so maybe if you can both concentrate on pleasing each other in other ways, her libido might start coming back again.

But in the end, you would be justified in ending the relationship so that you can find a partner you can have sex with.

First I agree with everyone here that you should confirm that you indeed have a UTI and its not something else. That said I used to get recurrent UTI's and there was a point I had a standing prescription for antibiotics. It was the worst - what helped me was this probiotic and of course keeping up with the Azo cranberry. Havent had one in like 4 years phew. Again do not take antibiotics at will and without supervision - antibiotic drug resistance is a real danger. Also cleaning up my diet helped. Hope you feel better!

I've heard about this problem before, of things getting a bit off after receiving semen. I have also heard of people using capsulized boric acid to treat mild BV (search for it in /r/sex, pretty sure I read about it here initially) -- but not Vitamin C.

Anyway, you may be getting into a cart before horse thing. Not all bad smells are going to be a result of BV, and you could potentially do more to avoid the presumed microbial imbalance that is resulting in the smells.

I've been seeing someone with a vasectomy, and having seen this issue pop up in /r/sex before, I was a little nervous about getting smellz down there as a result. What I have been doing is the following:

1. I always pee after sex because I'm a little UTI prone. So still pee after sex, but before that
   
2. I use a clean finger to kinda clear out as much excess cum as a I can so it's not just around in there
   
3. No vaginal funk
   
4. Never hurts to take a good probiotic every day, I've been taking this one touted for vaginal health. Pricy but I have a long history of antibiotics use that had kinda messed up my colon microbes so I find it worthwhile to invest in good probiotics.
   
   I imagine that other aspects of bodily chemistry (his and yours too; not sure how BC might affect your vaginal microbiome) so your mileage may vary. But I would try sticking a finger in there to clear it out before you stick Vitamin C in there?
   
   PS Link to use on boric acid for BV, from University of Wisconsin: http://www.uwhealth.org/healthfacts/obgyn/7683.pdf
   
   Not saying this is what you "should" be doing, just that this may be what was meant instead of Vitamin C.

I have used both below brands, and they both worked:

https://www.amazon.com/Jarrow-Formulas-Fem-Dophilus-Supports-Capsules/dp/B001C3Y0GO/ref=sr_1_7_a_it?ie=UTF8&qid=1478645993&sr=8-7&keywords=Vaginal+probiotics

https://www.amazon.com/Renew-Life-Ultimate-Vaginal-Probiotic/dp/B0042KULCG/ref=sr_1_1_a_it?ie=UTF8&qid=1478646026&sr=8-1&keywords=Vaginal+probiotics

I haven't been using soap anywhere near there.

I'm on this probiotic: Renew Life - Ultimate Flora Probiotic Women's Care - 50 billion - 60 vegetable capsules https://www.amazon.com/dp/B0042KULCG/ref=cm_sw_r_cp_apa_jf0XBb6R7JKQ8