Is it just my period or something else?

I know y’all aren’t medical professionals or anything and I’ll go to a dr if it reaches that point just want some opinions on what y’all think.

So my boyfriend and I have probably been sleeping together everyday for the last like month I wanna say. About 4-5 days ago I took a plan b just in case cause we were dumb the night before. Not much came of that and we went about our business. Well last night I was cramping and super bloated and I just felt sick to my stomach, when I got home though I realized I had been bleeding like a lot. We didn’t have sex last night just early that morning and my period isn’t supposed to be here for another 12 days and my body is usually like clockwork. This morning I’m still bleeding and cramping and its not like my past periods at all. Idk I’m freakin out a little thinking I could be having an early term miscarriage or some shit like that. I know bodies are weird and can change at any moment I’m just kinda feeling very what the fuck about it.