LADIES, I NEED HELP!

L

I took 4 pregnancy tests on 01/30/18 & they all came out positive. I’ve been having the normal pregnancy symptoms.. still do. But this morning, i had a heavy blood flow as if i started my period, so i took another test & it still came out positive. I didn’t go to the ER but i do have a doctors appointment on Monday. Does anyone know what it could possibly be? I NEED ANSWERS😭