Pregnancy Info HOME

ok here's my situation: i was due to have my period on the 27th of April...i started a week before that and it was very heavy bleeding and i even passed 2 blood clots maybe a lil bigger than quarters..i waited a couple of days to see how everything went and i just kept bleeding heavily never had anymore clots though. But what was throwing my off was that i was feeling really nauseous, bloated, a little pressure and slight twinges in my lower abdomen, really tired (id have to take a nap as soon as i got home from work at 1pm). I took a pregnancy test on the 25th and it came back negative. the next day i went to the doctor they did a urine test which still came back negative. But i didnt know if that was too early. its now the 30th and of course i didnt bleed any during my scheduled period. but idk if its because i bled the week before that? But since my doctors appt on the 26th ive also had a few headaches, some backaches, and my br___t were also very tender yesterday and the day before that. ive got an appt to get an ultrasound on Wednesday the 2nd and basically im just curious...could i be pregnant? i know ive heard of all these women still bleeding heavy and even having clots and still go full term and have healthy babies. Im so scared that i could have miscarried. :( im just trying to stay positive! PLEASE HELP!!!!