Last month, I had my normal menstrual cycle as planned (for 6-7 days). Then 2 weeks later it happened again (lasting exactly 7 days). Another 2 weeks pass and I have my menstrual cycle begin as normally scheduled; however, today is the 8th-9th day I've been bleeding... Not sure what to think...
Should I be worried? Is this normal?
I am 17 years old (I'll be 18 in september). I recently graduated high school, moved out of my parents house, moved into my boyfriends house (with his parents) and have since then taken on a lot of stress. Thus effecting my sleeping/eating habits.
[I have heard these factors can play a large role in the menstrual cycle and its regularity]

Most likely stress, monthly cycles can be affected very easy by change in habits, eating and more.

I will not address the living with boyfriends parents, ( never a good idea)( but perhaps you would like to come to dating or relationships and discuss that

If it doesn't stop in the next day or two it might be worth a visit to your doctor? What sort of birthcontrol are you on? Have you had to take a Morning after pill? Stress, anxeity, illness, and drugs (prescribed mostly) will affect a woman's cycle as well as things that you just don't know or can't be prepared for. Every woman has wonky periods on occasion, but this one seems odd.

Good luck.