How can you get over altitude sickness quickly? i don't want to ruin my vacation.

Certain diuretics: Certain older diuretics (not thiazides) will help. In peru, they use a tea not legal in the us.

Be Smart: Diamox--a diuretic that is sulfa based--should be taken 12-24 hours before reaching the trouble making altitude. Also, limit activities; go slow the first day or two. If you can, sleep at a lower altitude than what you are skiing or touring at: this will reduce symptoms too. High dose Motrin with food has been shown useful but discuss with travel provider first. If ill, drop altitude to be safe!