What Are The Chances Of Pregnancy After Stopping Birth Control Pills?

Hi, so I had my period two weeks ago, I was taking my birth control pills and just recently stopped. I had unprotected sex after not taking the pills for a day or two. Now my period came two weeks early. I do not know if that is due to the sudden stop of birth control pills or because I had unprotected sex a few times after. I am worried that I might be pregnant, I dont have cramps, I've been really hungry, and I've been extremely tired. Please if there is a specific explanation, respond as soon as possible.