The left side of my face is very hot and red and feels swollen but doesn't look swollen my eye feels funny. should i see my gp?

See your GP: While you're at it, see your eye doc, too, either Ophthalmologist or Optometrist to evaluate your eye (watch out for double vision and/or change in visual sharpness). Perhaps you have a sinus infection but I'd also be worried about spread to your eye socket since your "eye feels funny". If you can't get in to your GP, go to your nearest A&E.