Excessive sleep or Hangover?

I don't know which one is it now.

I'm having a headache right now...not the one that I've had for the last 2 weeks. (I think that was tension headache since it felt like someone was pressing against my temples all the time.)

It's a different one today. One that I feel like I have to lie down the whole day and not move my head higher than my legs, i.e. parallel.

I don't think I've had excessive sleep since I've only had 9 hours which was pretty normal for me on a weekend. Hangover's kinda out as well since I've only had a few drinks last night, and I wasn't even sorta high when I got back home. So what is it?

I dunno.

But since I've had these stupid headaches for the last 2 weeks it's driving me nuts. I can't think or function properly when I have headaches. Makes me cranky and irrational sometimes.
OK, all the time.

Been taking plenty of water but trying to stay off the painkillers. I hate having to resort to them unless it's absolutely necessary.

Probably, I'll convince myself that it IS tension headache, since the case I'm working on for the last two weeks didn't come to a conclusive end that I would have liked.

And I'm sticking to that.

God, how I wished it would go away now. Stupid headache.