why haven't i gotten a pelvic exam yet?

i am 18, about to turn 19 in a few weeks, i just saw my doctor yesterday, to adjust my birth control medication, and i asked if she was going to do a pelvic (because i was on my period) just i case i had to reschedule it, she said no. even when i first got prescribed my birth control i didn't have a pelvic. i have never had a pelvic exam before and i am sexually active. is this something that i really need to press her to give me? or should i look for another doctor? she is a family doctor, if that makes a difference, it took me a long time to find a doctor that i was comfortable with after i left my pediatrician, who would not put me on birth control and just laugh it off when i told her i have really bad periods to the point where i am physically sick the day before, and the first few days of it.