I am feeling heavyness in my head since 7-10 days. Sometimes it is on top of my head and sometimes on one side on back of head.After doing work for 3-4 hours especially or while sleeping. My bp and sugar are normal and i also had my neck xray and it is also normal. I also had my left top corner tooth extracted 20 days before. I dont know the exact reason for heavy head. Pls suggest me for this! I am not driving for some days and feel littlebit of  weakness also.