Im so confused can anyone plz help me(pregnancy)?

OK JANUARY 19 ME AND MY BOYFRIEND HAD BUT JUST A QUICKY BUT WHEN HE PULLED OUT HE WAS ALREADY MING! THEN WE DID IT AGAIN ON THE 23 BUT IT WAS PROTECTED BUT THEN MY PERIOD CAME EARLY LIKE A WEEK ON THE 4 IT LEFT AND IT WAS IRREGULAR IT ONLY STAYED FOR 3 DAYS MORE LIKE 2IN A HALF BUT ON FEBUARY 10 WE HAD UNPROTECTED AND MY APPT. TO FIND OUT IF I AM IS ON FEB. 25 BUT I NEED ANSWERS NOW COULD I BE PREGNANT... AND TODAY FEB.16 MY STOMACH IS HAVING THESE SHARP PAINS LIKE CRAMPS???? IDK WHAT IS HAPPENING TO MY BODY.....(HELP ME PLz I NEED ANSWERS) I WOULD GREATLY APPRECIATE IT