Pooping problems?

Every day before school on my way to the bus i feel like pooping and I cant hold it in very long, so i drive back home and poop, but i dont poop that much. Then when i get to school i poop a lot 3-4 times before 11 am, and get minor cramps during this. I was tested for giardia and even after taking pills and tested negative i still get this, im getting a colinoscipi in a week but im still wondering what it might be?
I get nervous and worried about it thet night before and morning before too.

I also feel somtimes constipated during the weekends and dont get these symptons.

My only possible conclusion is.. what the HELL have you been eating for breakfast?!

maybe a diet change or try a stool test before they go up your bum

are you stressed possibly? or, it may be just a bug in your system and you may want to just rest and take it easy

sounds like Irritable bowel syndrome.
eat more veggies
get more exercise
drink peppermint tea
get up earlier so your body had time to do it's thing before you leave the house.

Its just that you haven't finished you business when you go to the bathroom, and that why you have to go so much.

You have to make sure that your relax and all comes out.
The colinoscipi is good, you might lose some pounds from carring all that extra weight of feces.

Set a day aside and fast. Drink nothing but water and try to clean yourself out. There is something in your system that is just not right.

You do sound like you may have IBS (irritable bowel syndrome). It can be treated with medication, diet changes and stress reduction techniques. Here is a site that will tell you more about it. Good luck with your colonoscopy.
http://disgestive.niddk.gov/ddiseases/pu...

dont eat cheese and PB, eat more fruits lol

It has to be the food you're taking in. Look for something that's common that you eat everyday. It could also be diary products (milk, etc) just in case you might be 'lactose intolerant.'