Confused and worried

So I am taking progesterone only birth control pills. I haven’t been on them for a full year yet. And for the past two months i have not gotten my period, and for the past week and half I was kinda taking them a little irregularly cuz I was on a trip. I stopped taking the pills for 5 days now to see if I would get my period, but I still haven’t.... can anyone explain for me??? This is really stressing me out