Need help mamas!

Y’all, I’m so confused. My cycle had been weird for a few months due to the depo shot that I got the first week in January (so it’s over now). I got my period May 2. it lasted 6 days. then a week later I got it again and haven’t gotten it since. My nipples have been really sore for the past 5-6 days. which never happens with my period. On tuesday I had pretty bad cramps and could have SWORN I was going to get my period. Never got it. had cramps the next 2 days randomly and no period. no spotting. I haven’t had period cramps since Friday I would say. No spotting at all. I took a cheap target test and got a second line, but 75% of people said those tests are notorious for false positives. and I totally believe it. Yesterday I took a first response and saw the FAINTEST line that a camera couldn’t even pick up. so faint some people probably wouldn’t even be able to see it. I’m just confused. I dont know when I would have ovulated. 2 weeks after the first period or 2 weeks after the second? My cycle was all over the place. but I definitely had period symptoms last week that just went away. My boyfriend is pretty careful, we don’t use condoms but he pulls out every time (and yes I know pull out babies are a thing)