ANSWER FAST!

I have an implant on and is suppose to expire in about 20 days. My periods are usually irregular and sometimes they even come two times a month. This month it hasn’t come and had sex like 2 weeks ago and according to my calendar I’m 4 days late.

I recently went on a flight, does that affect your periods? Is it normal for flights to make you skip it? It has happened before to me but I idk if it’s normal or if the implant is less effective cause is about to expire.

(Btw I cant take a pregnancy test cause I live with my parents)