Worried question

So I am on progesterone only birth control and i haven’t had my period in two months, should i be worried? When i first started the pill i was late by a month, after that i only had my period for two days, then the next month four, and then in January i had my period THREE TIMES! After that for two three days and so on. But now i haven’t had my period in two months and i just lost my pills and haven’t been taking the regularly lately anymore. I am also a little sexually active. I wanna ask my parents or my doctor but I’m absolutely afraid to because i’m 17 ans my parents CANNOT know i’m active. Is this normal or should I be worried about my period? I also use male condoms for protection