MISCARRIAGE???

I’d just like a few opinions I think I may be having a miscarriage and I don’t know how to feel and I’m not really sure if it’s even happening. So I thought i was pregnant, period was late (if I was pregnant I would’ve been just under 2 months along) but I’ve been having weird symptoms recently like vomiting and feeling nauseas, back pain and my mom even came to me and asked if I was pregnant before I told her my period was even late just because of the symptoms I was having. Then today I got what I thought was my period and maybe It was just late because I have been very stressed (although my period is always regular so I was confused) but so much tissue/blood clots have been coming out and my period has never been like this at all. And since I was never positive if i was pregnant I’m not sure if this is just a abnormally super heavy period or not. Especially because I didn’t think I was pregnant at first because we used a condom, I don’t take birth control but I thought a condom was enough also I had what I thought was my period a few days after having sex but that could’ve just been spotting at the beginning of pregnancy. I just want a few opinions on what you all think is happening because I’m not really sure how to feel.