pregnancy after the pill????

So, heres the thing, i stopped taking my birth control(ortho trisycline lo) after almost 2 years, on the 4th of april....i had what i thought was my period on the 7th, i thought it was my period because it lasted 5 days...just not as heavy as usual... but i was told it was just what happens when you stop the pill...so i havnt had a "real" period yet. and i was due to start on the 19th of april, and its now the 10th of may..regardless i would have been late. if i went by the day i started what i thought was my period id be 5 days late today...if i went by the 19th,when i was supose to start, id be like 3 weeks late... i had unprotected sex, in the time iv stopped to now.... my bf and friends thought i was preg. i dont think so...... i was out at hospital for ecoli, and they did a preg test, n it was negative....i took 3 different ones at home in the past 2 weeks.....negative as well..... i was at my family docotor today for a check up on the ecoli, and my mother had him do a blood preg test there too....i wont get the results back until tomorrow or thursday... i kno the period can stop from happening for a while after stopping the pill... but does anyone thinkg theres a chance i could be pregnant and the tests were just too soon to come up positive?? iv had a few signs i guess....but there also signs of getting off the pill, and my period.....just without the period itself being here. i feel sick in the mornings when i wake up and when i lay down to sleep at night(my mom says is morning sickness), my breasts seem a little bigger then normal, and a little sore, im moody more then usual, im always tired, and i have a thing for cool ranch potato chips now.... i used to hate them things most of the time....and my smell is stronger at times, and i get head aches more.... alot of it could be from being off the pill, or my period happening soon...im just not sure what to think and my mom freaks when i talk about it!! so idk who to talk to right now. help anyone??