Very late Period

My period had been exactly 22 days late today I have been sick the past 3 weeks but I am also sexually active im only 16 and worried I may be pregnant but have no way of finding out what do I do? I don’t have any symptoms or anything at all ( I have no way of getting a test my parents are very strict on this if I ask they will freak out and I have no money at all to buy one right now )