head pain

about 4 years ago i slipped and fell running up my walk way and slammed my head into the cement. a couple years before that i fell out of the shower and hit my head on the toilet. I had been getting a lot of headaches after that but i never told anyone becuase i was afraid something would be wrong. I haven't had any really bad headaches like that up until a couple months ago. i don't know whether its a  brain tumor or something? I probally should have gotten my head checked when i fell the first time. Should i be worried or is it just a normal thing?