Sharp Pains, Pressure

around last november [2006] i began having sharp pains in my head. it's not constant and they only last a few seconds. sometimes i get them many times during the day, and sometimes [although not often] i won't have any during the day. the only way i can think to describe how they feel is that it feels as if someone is pricking my brain [or nerves in my head] with a needle. it doesn't always happen in the same place, but is generally in the right back and front and the left back and front. about 1 1/2 weeks ago i began feeling pressure in my head, sometimes accompanied by mild nausea, and the sharp pains also. the way i can describe the pressure is that it feels as if someone were putting their hands on each side of my head and pushing as hard as they possibly could. the pressure/nausea often come together and come and go through out the day. it makes it hard to concentrate at school when they happen. my mom is worried [i'm only 17] because she says my pupils are larger than they should be when there is plenty of light and she says it could be a sign of disease. she took nursing courses a while ago, so i'm just trusting her at the moment, although she's definitely not a professional. [no, i'm not doing drugs. that is not the reason for my pupils being large]. she has been promising to make an appointment with my pediatrician for some time, but still hasn't done so. i would like to know others' opinions on this matter.

update: i don't know if this is related, but i was sitting in class today and the left cheek on my face went numb for about 1 minute. it was very odd, especially since this has never happened to me before. like i said, though, i don't know if this is related.