What is happening ??

So on the 13th November I miscarried (12 weeks loss) Spotting for two days, felt not to bad. Friday night (15th) ended up in hospital bleeding out. They fixed that.

I have literally been spotting this whole time and now it’s more loads of ewcm mixed with the spotting.

I have also been told (confirmation today) that the last scan showed there was still remaining pregnancy left. I nervous to get an infection. The last two days I’ve had cramping pain but a little more painful than usual period cramps but not worrying. On and off painful headaches. Slight nausea. And cervix feels tender.

Is it normal to feel like this almost 4 weeks after miscarriage or should I be concerned about possible infection starting ?