Please HELP! I'm confused

So. All dollar tests with the lines have said negative. The equate digital from walmart said pregnant, two of them. My mast period was April 1st-5th. I've had some pregnancy symptoms. I found a dollar test and took it after the positive and it said negative. Then today I spotted and had lower left side pains. Now several hours later I go too the bathroom and blood gushes..it is brown on my panty liner and red in the torlet. I took a clear blue digital jus ne and it said not pregnant. So..am I pregnant or not? Is this an ectopic pregnancy? Am I miscarrying? Is this my period? I have no pain now. Jus lower real low all across it is like a pulling feeling, idk. But now it is gone. I have an ob appt at 330pm. Do I wait or go too the ER? All they are going too do is a urine pregnancy test. What do I do? I've never had this happen. And I have two other children and never did the tests. My oldest I went too doc bc I jus knew and it didnt come back positive till 7wks and 5 days but never took any after that and that was at a doc. My second I didn't know I went too doc for one thing and they said I was 5.5 months pregnant. I dont get why some say yes and some say no especially no then yes then no. I'm confused. I'm scared. Idk what too do. Please help......