My boyfriend and I had unprotected sex 4 days before my regular period, I got my period as expected on the day I regularly get my period, can I be pregnant? Or should I wait until my next period to find out?

Most likely you aren't pregnant, but since no time during your cycle will be safe 100% of the time you'll have to see what happens when your next period is due. Odds are in your favour however. Obviously, to avoid an unwanted pregnancy, or at least increase the odds even more, make sure you use protection every time.