Spotting and no period :[ Pregnancy?

My girlfriend told me today that she had spotting instead of her period two days ago.

She is on the yasmin birth control pill (drospirenone and ethinyl estradiol) and is consistent in taking them every day. She tells me that she has never spotted instead of having her period.

We had sex without a condom on Monday, she took an active pill on Monday, no active pill on Tuesday, and expected to begin her period on Wednesday. However she experienced spotting and now that its Friday we are both nervous that it might be pregnancy.

I've heard that implant bleeding usually happens 6-7 days after sex, and i'm curious how likely is it that my girlfriend is pregnant.

[ashiepooh]

well did the doctor ever tell her if her periods would lighten or stop?  I think I heard that they lighten on that birth control, but I'm not 100% positive.  

Implantation bleeding can happen when she expects her period.  So that's usually 9 to 16 days after conceiving.  

Was she due to start her period two days ago, or is that just when she spotted?

[Cyberpunkish]

both, she was due to start her period on wednesday, but instead just spotted lightly. and we had sex only four days ago.

[ashiepooh]

well doesn't sound like she'd be pregnant then.  Have you guys had unprotect sex besides monday in the last 16 days?  If it was around sept 29 to oct 3rd ish that the unprotected sex too place it'd be more likely to be pregnant.  But not monday.

but i'd tell her to take a test.  since her period was a spotting....  You would know because it would come up positive if she was

[Cyberpunkish]

We were attempting to have sex on october 7th but before I could even penetrate someone knocking at the door and we had to get dressed.

We made genital contact and I know that pre-ejaculate can cause pregnancy but the whole thing was so brief i didn't even have pre-ejaculate or a full erection.

[Cyberpunkish]

someone was* knocking at the door

[ashiepooh]

Yeah its doubtful then that'd she be pregnant, but to ease your mind....she could take a test!  I think it's the birth control though.

[Cyberpunkish]

Yes, of course, i've already purchased the First Response kit and i'm sure shes done the same.

Thank you for the help, I don't rate unwanted pregnancy as one of the things to try in college :p

[ashiepooh]

lol well good luck!!