I'm very worried, i get wierd headaches on the left side of my head. Also i get a slight pain and than it feels like my head fills with liquid. Its wierd to touch and very wierd feeling just on the left side. I'm really scared...it's been happening for a while now. It doesnt really feel like a headache based on its only in one spot, but it pulses and gives slight pain....any insight? im scared. i'm young so i just thought it was nothing...

There are a number of things that can account for the pain, brain cancer is probably not going to be one of them. You shouldn't jump to that conclusion. See the doctor so you can find out and not worry. Lots of people have headaches that are attributed to a lot of different things. The stress over it will likely keep any headache you have from going away! Please see the doctor. Might be a good idea to write down your symptoms as they happen and take it with you to the visit--that way you won't forget to tell him/her something.