Should I See A Doctor For Irregular Periods, Pain, And Possible Fertility Issues After Unprotected Sex?

I have very irregular periods. Like one time I didn t get it for 5 months. I also have sharp, dull, and stabbing pains but they come and go. Me and my bf have had sex several times unprotected and I think I might have fertility issues. I m 5 foot and 90 pounds. Should I maybe go see a doctor?