Whoa there, don't give up! If I had a quid for every bloke / blokess who was unwell on their first (or even subsequent trips), I'd have retired years ago. First of all, keep at it; as you get more experience, the sickness will in all probability gradually go away (it did with me). Some tips to help in the meantime to minimise queasiness:
- Never fly on an empty belly
- Never fly with a cold
- Never self-medicate
- Keep your eyes outside the cockpit as much as possible
- Keep busy
- Keep the cockpit temperature cool
- Tell your instructor immediately if you feel unwell - if he is unsympathetic, get a new instructor
- Always carry a barf-bag (works like an umbrella - if you've got one, it never rains)
I've probably left out loads of tips, but fellow Ppruners will no doubt help out -in the meantime, try the above before you go spending money on uncertain "cures" and "remedies". Finally, remember that flying is the best fun you can have with your clothes on - good luck.