Please help. Worried about needing to go to the ER

So I got a shot of Methotrexate for an incomplete miscarriage. I got it 8 days ago and all the sudden I’m bleeding heavy and I have a headache. My levels went from 308-227 but I’m worried something is wrong. I’ve been bleeding for 5 weeks total at this point and just want this to be over.

Did anyone else experience something similar? I don’t want to go to the ER.