Do I have Insomnia? or did i just get into a bad sleeping patter?

I'm 17 and i never really had this problem..i researched about it and it can be caused from stress...i wont get into the long story cause theres a lot of stuff stressing me out but my parents got a divorce which caused stress which moving and all this other stuff added on..But pretty much since then for the past year ive been having these problems...last year it was hard to get up in the morning but this year i realized that it culd have just been i actually need to just get up then im fine..so that may not have been insomnia..but this year i have beens not able to fall asleep till like 1 am to 3 am and i lay down to go to bed around 10 30 11...does this sound like insomnia? because i sleep after school for like 2-5 hours since i dont sleep at all at night..is this insomnia or is there another reason i cant sleep and if it is insomnia what should i do and how do you like grow out of it?