pregnancy?

i’m on the pills that have a week inactive, so i usually get a very light period. but last month i didn’t get one did some research and seen it can happen maybe shouldn’t worry. even tho i take my pills everyday properly i still worried and have took 4 test and the latest one was the 21st, all negative. tomorrow i’m supposed to start my new period is it possible i just stopped getting them? or should i continue to take tests and trust them that i am not. im only 17 and don’t want to worry my mom and go to the doctor.