Can someone help, miscarriage?

Amber
I don't know what going on, I dint have my period for 4 months and they couldn't figure out what was going on so I went back on birth control. And I got my period 4 days ago which was very very heavy! I figured it was cause I haven't had it for a while, well yesterday I had to change my tampon every hour otherwise it was completely full. And I had server cramps that it had me crying. This morning I woke up to feeling wet, ran to the bathroom with blood dripping down my leg! I cleaned my self up and wiped and there was a big clumpy blood clot, jumped in the shower and there was still blood dripping down my leg. And now I just changed my tampon again and there was another blood clot with a little lighter color, and now I'm in bed with sever cramps. Anyone have any idea what could be happened😞😞 I just wanna cry because of the pain