is this normal? should I be concerned? could I be preggo?

I'm 18 years old. My period was 2 weeks late last month. I got it May 7th instead of April 23rd. I was expecting a period around the 4-7th this month and still nothing. I've been feeling pretty bad cramps and extreme bloating and some breast tenderness.  I'm a virgin somewhat. Have only had oral sex and dry humping where my bf would never cum on me just in his boxers or in the sink. Should I be concerned about pregnancy at all? Am I just being crazy? Please help!