Dull ache in vagina - sign of ovulation?

Kelly
Hi guys! I'm new to this site. My DH and I decided to start TTC this month. My cycle is usually regular (around 28 days). I'm currently on day 13 of my cycle and have a dull ache in my vagina...hard to describe but it's like it feels really heavy! I usually get this just before and during AF but never noticed it mid cycle before (perhaps because I wasn't looking for signs). Anyway, is this a normal sign of ovulation? DH and I have DTD a few times in the last week and will do tonight...I'm just curious as to whether this means I'm ovulating? I haven't used an OPK and don't plan to unless we have trouble conceiving (fingers crossed!).