I believe with every fiber of my being that acid in the pH of 4's and even 5's, kills at least SOME sperm (and probably quite a few). Tamara would say that it does not kill sperm, it simply makes Y sperm "go to sleep" and if the pH goes up, they will "wake up".
TBH I think that frequent release PLUS j and d PLUS RepHresh, Acijel, Sylk, and antihistamine (I'm assuming you're taking that) and spermicide if you decide to use that, is overkill. But, hey, give it a shot or two (if you feel so motivated, since you're doing so brilliantly on diet) and if it doesn't work you can rethink some of it.