Over a month ago my girlfriend stopped taking birth control, I dont know which type, and had been taking them for about a year. About 2 weeks ago we had sex, and for a few seconds (stupid, I know) we did it without a condom.

So now, her period is late and she has the following symptoms:

-Breasts extremely sore and have grown
-One day, a little heartburn
-Very bad cramps, consistent with what they were without birth control
-Light spotting a few days ago (Implantation?)
-I haven't seen them closely but her nipples "may" be darker, or shes paranoid (as am I)

Ive looked around the internet and it seems alot of girls have problems coming off of birth control...so anyoe else's opinion here?