I get this really bad pain in the bottom right of my head. it gets to the point where i feel real tired. what is this and should i be worried? help

See your doctor: Best to go to your doctor to have him/her physically examine the area that is painful. So they can make a better decision on what you should do. This can't be done without a physical exam. If further workup is needed, they will know exactly what to order for you. Hopefully, it is no more than a musculoskeletal reason. That's easy to remedy.