About 2-3 weeks after sex you can start having a positive if pregnant.
if i were to get preg two days ago how soon can i test for that?
If your bleeding on the 21st was implantation bleeding it would take at least 6 days for a urine test to be positive, so you should be able to take one now but I would also repeat in another week if it is negative to be sure.
so at the earliest how soon can i know i am pregnant, if i am? the last time i had sex was two days ago. so "if" i got preg then, how soon can i test?
Absolutely. Your periods can also be crazy for a while, mine didn't go back to normal for a year and a half after having my Mirena removed. Take a test, and find another method of birth control that suits you if you don't want to be pregnant.