Hope confused need advice

Sunday night I took a pregnancy test and Monday I took one they say positive I'm pretty sure and today I took one, not sure. Well this morning I woke up with cramps and a lower back ache. I got up to pee and bled. Like every other time I went to the bathroom today I bled. The first is Sunday second is Monday 3rd is this afternoon and 4th is all 3 this bottom is most recent. What to do?