I am 17 years old.. last time i got my period was mid december. my boyfriend and i had sex the day after i finished my period.. and just to be safe i took plan b. one week exactly after that i got my period for a second time. i missed it in january and again in february. I have been stressed and crying a lot in the last two months and being pregnant has been on my mind every hour of every day that has gone by since decemeber. is there anyone that can help ?