please HELP!

I’m bleeding terribly. Going through a super in little less than an hour. When i take the tampon out there’s lots of uterus pieces and like a crazy amount of something that looks like mucus like just hanging down at least 8 inches from the tampon it’s so thick. I don’t think it’s my period bc i never got my periods regularly. I had a similar problem earlier when i had a copper iud but after two months i had to get it removed because i started bleeding uncontrollably. It’s been out for about a month now and i’ve since then had no problems but yesterday the bleeding randomly started again. Does anyone know what would cause this? I really don’t want to go to the er right now or anything because of everything that’s going on. Thanks