Hi, sorry for posting so frequently. This tension headache is really getting worse. I didn't have any other symptoms earlier, but about an hour ago my vision started to get really warped, and when I tried to stand up everything went black. I think I almost passed out. Haven't gotten a chance to see a doctor since my university clinic closed at four. Any suggestions? The wierd thing is, it was gone all day. All of a sudden its back and worse. Could this be from high blood pressure?