Pms or pregnancy??

This may seem dumb to some people, but I genuinely am curious if anybody has some advice. I’ve had an IUD for about a year and a half now. It has been anything but positive. I went from having no periods to getting heavy, week long periods every 2-3 weeks for about three months. Then my OB prescribed estrogen pills to help me start over on my cycle essentially. Now, it’s back to zero periods. My boyfriend and I don’t use any other protection due to my IUD, which I know isn’t the smartest move but I had faith in the little IUD lol. But the last couple weeks I’ve been getting these symptoms I haven’t experienced since before I got the IUD. It’s so hard to tell between period symptoms and pregnancy. I definitely plan on taking tests but has anybody else experienced this? What was the outcome? I just need some advice since nobody I know has an IUD 🥲