Ovulating? Help

So I just started using this glow app and so far it's been amazing and a big help... Me and my hunny decided recently to try for our last baby! My period seems to be non existent except when on birth control, but I have 2 babies so I know I'm ovulating just with no period I had it last month from the 28-2of Feb and have had intercourse everyone day after.... but just tested and all bfn 😔 but as of yesterday and today in having a pain in my left lower stomach area like cramping? Just that side and I have a moderate amount of clear egg white gooey mucus? am I Ovulating? about to? Or done? I had intercourse this morning?? Any inputs or advice !