First of all, your partner should read the instructions that come with the package.
Second, a girl is normally advised to start taking the pill for the first time on the Sunday after she starts her period.
I have only been on the pill since July. My b/f (a typical man
) could not wait to start having sex. We also had sex two weeks after I started taking the pill, only he did ejaculate. I am sitting here today not pregnant.
Now, I'm not saying that your partner isn't pregnant, because it does take a full month for the pill to be "incontrol" of the female body. However, I think the best advise for you is to talk about the situation with your partner. See if she feels the same way you do. If she thinks she is pregnant, then get a pregnancy test, but if she thinks that you are just freaking out, then you are probably doing just that freaking out.
Best of luck to you!!