Can I Get Pregnant after Being on Birth Control for a Week?

ive been taking birthcontrol for about a week and i started my period a day late. i know for a fact that birth control doesnt work right away only after a month but i have had uprotected sex and i keep feeling like im gonna throw up . i get nausea alot i cant even sleep or smell certain things. i did start my period but a day late and it is very light nothing really comes out just a little. whats wrong with me ? ):

Worried (18)

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Dear Worried,

Hmmm … could  you please give me some more details? Sorry! That’s how my mind works – details, details, details :)

Here are my questions for you:

1. When did you start taking birth control? (i.e. what day)
2. Have  you been faithfully taking your birth control over the week that you’ve been on it? (i.e. no misses, no super late taking of pills)
3. When did your period in September begin and end?
4. When did  your period in October begin?
5. Did you have unprotected sex only one time or multiple times?
6. When did you have sex?

Once you’re able to fill in the gaps, I’ll see what I can do to be of help.

Thanks much,

Hannah