Should I be concerned?

So I’m currently on my period and although blood clots are pretty normal for me because they’re never huge or alarming but I was in the shower yesterday and this really big blood clot came out of me. I mean it was huge like the size if you made a C backwards Ɔ with your right thumb and index finger. I’ve seen some tmi pics on here that resemble exactly what happen to me but I forget the name. So now that you got an idea should I be alarmed? My boyfriend thinks I should get checked cause he thinks it’s a miscarriage but I think I’d know if I was having a miscarriage and I’ve been gettin all my periods. Plus I think my weed smoking is what’s causing infertility. Maybe I’m thinking too much. Any advice ladies like I do want a baby but I also don’t know what to do really like I’m a 24 yo female with no children and all I do is work and go home. Not much of a social life so I don’t too much which is why I’ve downloaded this app to get an idea.