help me yall

so I started spotting 4 days before my period was due (11th) I was thinking oh snap it may be implantation bleeding..took a test BFN...it didnt stop until the 13th but my period wasnt due unti the 15th and i was gonna re test then but, I wake up on tbe 14th to what seemed to be a full blown period but its been on and off and it is still going on today 11 days later.....not sure what's going on thinking of going to the er monday if its still here because I cant get an appointment for another couple weeks. but any suggestions? or anyone experience this before what ended up happening?? annything!!!