The Never-Ending Headache

I have this headache that wont go away. It persists through endless rounds of advil, planty of water, and my daily dose of caffeine. I'm not sure what it's from, but I'm ready for it to be gone.

Here are some reasons I can think of for why my head hurts:

1. I am allergic to school
2. my thesis poster is due in two weeks
3. my developmental lab exam is in two weeks
4. my biopsych paper is due in two weeks
5. my paper on pornography is due in two weeks
6. my review paper on congenital heart defects is due in two weeks
7. my roommate wont stop peeing on the floor. Today I made it very clear to him that he is required to sit down to pee from this day forward or I will have his head on a stick.

Speaking of heads...I just wanted to share with you all that I cut up worms in lab which are regenerating as we speak. I will raise them and take them home to show you if you like. I'll even bring my dissection kit so you can cut one up yourself :)

This is what they look like in one peice (much smaller; like 2mm)...
And this is what they look like after about a week or so of regeneration after you slice them up the middle. They form two heads or tails or whatever depending on how you cut them. I also have a jar with a few cut in cross section so that the head is separate from the tail peice, and my prof claims that both peices will form a whole organism. neat eh?

Anyone know what the most easily regenerating part of a human body is?

and PS...if your child is 11 years old or younger and somehow cuts the tip of their finger off, tell the hospital to leave it unbandaged (after the initial bleed of course) and it will partially if not fully regenerate...but that's not the answer I was looking for :)