It could be stress, change in your diet, exercise. It could be a # of things. As long as you are getting them that's still a good thing. You can talk to your doctor if it's bothersome for you about your options.

How old are you and how long have you been getting your period?

It could just be that your cycle has changed slightly. My cycle is naturally about 35 days- I always used to worry that it was late until I realized that was just normal for me.

Or diet changes/stress (which I know are both a part of college) can play a part, too.

Good luck!

Im 20 years old...im already 8 days late =/ but all my preg tests say negative..could stress be pushing it back this far? Ive done no dieting and i havent been gaining too much weight either...idk everyone tells me not to stress but im just a stressed out person all the time...and when it comes to my period i get real stressed because since ive been of BC (december) ive had nothing but problems.

What BC are you on?

I was on Yaz I stopped taking it in december. I'm now 9 days late and I still get cramps on and off as well as my usual pre-period back pain =/

I started my periods when I was 13 and I am now 40. I have always had very heavy periods which have led anemia. I am on iron tablets still and have been on and off over the last 18ys. I have also suffered from very bad pms which has destroyed my life. My periods have been pretty much regular around 21-24 days but yesterday a very strange think happened to me that has never happened to me in my life before. I had my normal pms as usual and then yesterday I started my period. It was just a very tiny amount of brown blood on the tissue & then absolutely nothing. No period & no blood!!! so I am a bit shocked. I wonder if I have been going through an early menopause. I'm going to wait till next month to find out what is going on. I know I am not pregnant for sure. Also does anyone know if symptoms of menopause are related to PMS or BPD at all? I haven't been under any stress lately & I am eating normally. I remember my mother going through a very early menopause & I heard it can be hereditary. Can anyone help or is it too soon to tell?

I forgot to mention that I have also been suffering from terrible bouts of very hot flushes where my cheeks will be burning.