After working out next to weights and not breathing properly, I've have a metalic drink contained by mouth and headache.

It sounds like you hold an infected tooth. You should go to the Dentist in the past it gets worse.
If you capture headaches whenever you elevate weights you should go to the doctor
Whenever a headache strikes drink lots of hose .Lack of oxygen may have head to your headache. Place a few ice-cubes in a polythene rucksack, and apply this on the forehead and temples. Check out for more info

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