took plan B but wondering if i can stil be pregnant ???

so my boyfriend is in the navy it was the first time i saw him in 2 years im not on birth control or anything. i ended my period on january 27,2013 we had a party we got drunk and had unprotected sex on february 2,2013. the next morning my boyfriend was like we need to go get plan B so about 16 hours after having unprotected sex i took the plan B pill i had no side effects at all. about a week later we slipped up again and had on protected sex on february 9,2013 so that next after noon about 22 hours later we went to go get the plan B pill again. i know really bad taking 2 plan B pill on one month and so close together messed up my cycle.  on feb.18,2013 i started to spot like barely any blood like only when i wiped and it was like mostly brownish and i spotted on the 18 then i stopped on the 19 and then bleed again on the 20 and 21st idk if that counts as my period for February or not because that happened around the time i was suppose to start my regular cycle.  here it i march 10th and i get head aches almost everyday. light abdominal cramps everyday like ima start my period. back cramps just started 2 days ago and then today my breast started to have a pain in them and every time i eat i get sick to my stomach  i know  really screwed  my body up by taking plan B twice in one month but i didn't think the side effects would still be happening a month after taking it. any advice to why my body is acting like this after its been a month since taking plan B. i doubt im pregnant but everyone keeps telling me  am so now its starting to make me wounder about it