I am 17 years old and I have irregular period, that always comes  2-3 days late from the expected date. I have a boyfriend and we had protected sex on april 3rd, my periods were supposed to come on this 9th and it's delayed.

Another problem is i just shifted from a really hot country to an extremely cold one on 9th...can climate change and jet lag result in delay of periods?!?!

very scared, need reply asap!