I'm not sure what's wrong

Hey everyone, before I get into this a little backstory, I had a baby almost 10 months ago and as soon as I got to 8 weeks postpartum I got the paraguard IUD placed. Everything's been okay since I had it, I have extremely heavy periods, and am always either exactly on time or one day late every so often. I don't ever get nauseous when on my period, but my cramps are extremely painful the first couple days as well. I was having sex with my boyfriend 4 days ago, and was cramping really bad when we were having sex. We don't use any birth control method outside of my IUD, and I normally cramp during sex but this time the pain was worse. After we had sex, i cramping as if I was on my period, and light bleeding, every day, everytime I went to the bathroom, since then. Today, I woke up and supposedly got my period except I'm a whole week early, which is extremely unlike me, I've never been early in my life, even right after having my baby. I have a steady period, as soon as I got my first period after having my baby my periods just went back to normal, but heavier due to the IUD that I got. And now, I'm extremely nauseous and having stomach pains along with severe cramping. I can't move out of bed without wanting to throw up, which is hard especially with an almost 10 month old whose getting I've covid right now, and extremrly unlike me. I guess I was just wondering what was everybody else's experience with a misplaced IUD, or if it could possibly be a miscarriage? I've never had one and I don't know anyone who has and I'm sorry if asking that is offensive in any way! I just don't know what's going on, and the soonest appointment I could get was January 15th.