Talk to Gynecologist on Vaginal Dryness

Hi, I’ve been dealing with vaginal dryness ever since Ive had a baby, she’s 3.5 now but the issue hasn’t got better. Earlier it was fine, but now i always notice that i’m never really wet which causes friction and pain and burning after intimacy. Ovulation days are the only time i notice cervical mucus but we usually avoid those days as we’re not planning another baby for now, however sometimes i even don’t notice any wetness during intimacy on those fertile days even though there would be fertile discharge but still no wetness which makes the process easier. Not sure if i don’t feel aroused enough or my body isn’t cooperating. Sex life isn’t very active, we hardly have it once or twice a month. I also have pcos since 10 yrs but this problem wasn’t there before but only after the child. I Wanted to know if there are safe water based lubricants which do not affect the sperm motility? Kindly pls suggest, also advise if there’s any bloodwork that needs to be done to rule out any issues.