So I was supposed to start my period Dec.29. I had unprotected sex Dec. 22,23,25,27and28. He cummed in me all the times. I also had sex Dec.31 and Jan.1 same thing. I have had no cramping or bleeding. Just cravings and nausea a lot. I decided to take a birth control pill Dec. 31. I have bad headaches and also want to sleep a lot. Am I pregnant??

There are three ways to diagnose pregnancy. Urine, blood or ultrasound (that's later in pregnancy).

Since we can't access any of those things, there's absolutely no way to tell you if you're pregnant online. Could you be? Yes. Are you? That's up to you to find out.

Wait until you're at least 2 weeks late, then test using first morning urine. If the test is negative, then wait until your next period is due. If you miss it, then test again or see a doctor for a blood test.

Very likely since it appears you were trying, having that much sex without any protection.

Also you did not say what type of birth control pills. Just monthly pills, Abortion pills, morning after pills?

But there is no way to test or know at this point,