Not sure who to go to??

Dejanai

I had a miscarriage at the end of December. I’ve had two regular periods since then. This month though, my period is going on 10 days of being late. I’ve taken a million pregnancy tests it feels like and they all come back negative. Not sure what to do or if I should go to an ER doctor or see an OBGYN. My boyfriend and I had sex a few times during my ovulation period last month and with my period being late I thought we’d done it and made our little rainbow baby. I get negative after negative and I’m not sure what to do anymore or who to talk to about this or what could be wrong. I’m new to all of this and any type of help or advice would be amazing!!