I had sex yesterday and my boyfriend and he came inside of me, but I started my period today.. Is there any way I could be pregnant?

Was this a normal time for your period to start? If so, then it is unlikely you would become pregnant... although not impossible. You would have to wait a couple of weeks, if not until when your next period is due, to even try a pregnancy test.

In the future, if you are going to have sex, make sure you use protection every single time. Do not allow your boyfriend to have his penis near you without a condom on (no matter what he says) and it would be best if you also used some type of protection as well.

Even better, consider not having sex unless you and your boyfriend are both in a position to have and raise a child.

To lessen the odds even more, it would be wise for you to obtain an emergency contraceptive, such as Plan b, tomorrow from your pharmacist. To be used only for emergencies and best when used within the first few days after the unprotected sex (the earlier the better).

Be smart and protect yourself as you are the main one who would have to deal with an unplanned pregnancy if it were to occur.

Yes I was supposed to start around the first. And I know I hate for putting myself in this sitution.. it will never happen again