2 Months Ago I Started Waking Up With A Lot

2 months ago I started waking up with a lot of pressure on the brain, at 1st if I laid down I could feel it on the back of my head, Now when I sleep I wake with this abnormal amount of pressure like its ready to explode on my head, if I stand up for awhile it relieve the pressure. I talk to my dr. about it . He told me I was really tight in the upper shoulders and the back of my neck and he suggested some therapy this might help. I'm worried it might be a tumor or blockage. Any suggestions? I'm active and I exercise 4 times a week. But I do drink Rum drink every 3 days, 3 or 4 drinks. if this helps