Periods .. or lack of

Havent had my periods in precisely 102 days, i talked to my pediatrician (i dont turn 18 until the fall) about the irregularity of my period in the summer time and she did a blood test and has never said anything of the matter since and told me it was "normal" and my period is just trying to find its normal "cycle". See bitch, im not dumb💀. Im not insinuating that she thinks so but im in a nursing program, ive had my period since i was 11 and at one point my cycle WAS normal, and its irregularity started a couple years back by me getting less symptoms, being late a few days .. weeks .. months .. and now i get literally nothing. So ya see .. i know a thing or 2 about my vagina and uterus. Am i overreacting ? This isnt normal right ? Could switching to an adult primary care provider be 100% more effective when it comes to a solution (i think so but my parents dont listen) Help ??

sn: no i am not nor have ever been sexually active so pregnancy is out