Negative Reinforcement

Let's take a trip down memory lane to Psych 101...remember the rats who could be taught to perform a behavior for a food reward, or Pavlov's dogs who learned it was dinner time when they heard the bell? All positive reinforcements....

Lately, I'm more like the rats who were taught not to do something on pain of electric shock. For the last three weeks or so, since it's really gotten cold, after I get back from a run (and sometimes after an indoor cardio workout), I've been getting blinding headaches, sometimes full blown migraines. While I'm running I feel great. When I stop running and cool down, I feel great. Then half an hour to an hour later, I'm in tears b/c my head feels like someone drove a stake through my temple.

It could be allergy/sinus related b/c when I run, regardless of the temperature, my sinuses go nuts. But that wouldn't explain the migraines really. I think I'm well hydrated in general, and I drink a little water before I go out and drink when I get back. I don't usually eat anything before I run b/c I cramp if I do, but I eat within the hour of getting home. Not sure what else to do. Or, what to do differently.

I have a doctor's appt. in less than a month, so ideally I'll be able to hang on until then, but the migraine I had this morning made me two hours late for work, so I might have to suck it up and make an appt. sooner rather than later.

Any other runners out there have similar issues? What did you do to fix the problem?