i Finshed My last box of birth control on aug then got my period on sep 4 now its oct 14 n i havent got my period im 10 days late n done 3 preg test and all neg what should i do? i have alot of cramping like if i was gonna get my period but nothing i had then since the a day b4 i was suppost to get my period my back hurts my boobs are a lil sore n a lil light headed dizzy but all test are neg i dont know if its bcuz i left my birth control or bcuz im on some pills,or is it that im preg n it wont show on the test!! Help please should i wait a lil longer or should i go to the doctor cuz i tried goig were i always go n they wont see me till the 30 of this month y i dont know! and how long do a preg blood test to get the results?