I think my mind is playing tricks on me,
So I decided to have sex with a friend for my first time, I am on the pill and have been for a while, we used a condom... this was at the end of July, then in August I switched pills(being scared, I took 2 home pregnancy tests and they both came out negative), and then I got my period last week on the 5th day of my white(sugar) pills, I don't know why I just can't get the idea of being pregnant out of my head!
Can someone tell me to calm down ?

How old are you, Does the 13 in the user name mean you are 13? If so, there is good reason to be scared.

But birth control pills are not 100 percent. But changing pills after sex has nothing to do with it. It would be all the pills you took, the month before, and not missing a single pill. The more pills you miss, the greater the danger of failure.

But anytime you have sex, there is a chance of pregnancy.

Some women even get pregnant on the pill and using a condom both.

If you had your next period and it was normal and on time, there should be no reason to worry about pregnancy.

The 13 isn't an indication of my age, its my favorite number... I'm 21, but I'm nervous cause I'm a fourth year university student and it just would not be a good time.

Note to self for future: No More Sex.

You got your period when it was due. Switching pills can cause a fluctuation in your period schedule.