I need some advice about ph and such.

Okay, so I had the Mirena for a year and a half and had it removed because I kept getting bacterial infections (bv) repeatedly. I got it removed and it went away. My biggest issue I face now is my ph being superrrrr sensitive. Like intercourse. Yeah, knocks it outta whack. & I get this musty type smell. I really don't think it's bv because it goes away on its own and I never have excessive discharge or anything else with it. No itch or anything. . To regulate it though I've always been on probiotics and I clean up with peroxide and water (I read it in a book) but my biggest question is when we're ttc what should I do??. Continue cleaning up with this solution, or let it go for the amount of time in my fertile window. I get afraid that if there's that smell and my ph is off that it's not the ideal environment for sperm...Like had anyone had this sensitivity to sperm and been to the dr and told what to do. Like I don't want anything to hinder the chances of conceiving.  :(