Brain Cancer

[girl20]

Hi, im really worried my head feels really funny on the right side it also feels a bit larger than the left side but when i touch it it feels normal like theres no bump. but it feels uncomfortable i noticed the feeling straight away when i was lying on my bed. I was also wondering if ne 1 knows if this could be due to the fact that my eyes are exposed to a lot of light all the time, or the fact that i might need specatacles? I dont really get headaches but i get a slight pain running through every so often. Is this something to worry about? or am i over reacting? please help!