I completely understand what you went through. I've had the same thing happen to me, except I smoked two bowls of some awesome shit. First bowl I felt awesome. Second bowl.. plus a couple of cigs I had the same feeling you had. Only afterwards I puked. And I've been smoking for 2-3 years now. It seems like you pushed your limit this time. I totally understand being nervous about smoking again too, I felt the same way after my bad expriance. Next time...
1. pick a better time to smoke (so if something happens again you can chill out and enjoy your high).
2. Check potency of weed. Alot of dealers will let you sample it before you buy it. If it's stronger shit, and if you're not a very expirianced smoker, then I don't recomend buy it. If you must buy it, smoke a little at a time.
3. Since you've only smoked 5 times before this.. This could be your FIRST time getting stoned. Sometimes when people get stoned for the first time, they don't realize what's happening and freak out causing them to panic and ruin their high. It happens alot.
4. I'm pretty sure smoking out of aluminum foil is bad for you. (I'm one to talk, I once smoked out of a ping pong ball, mmm melty plastic). Since you're still in school I'm going to guess you're under 18.. and if that is the case you should see if you can find someone who can buy a bowl for you. Glass are nice, they don't get that hot, and they hit pretty smooth, and they don't require alot of mantinence. Plus if you ever get in a situation where you to ditch it quick, they break pretty easy. Metal bowls are good if you're into taking care of it, cleaning it, changing the screen. I've read they will get you higher then glass though because they get hotter then glass and thats supposed activate the THC or something. I don't know if thats true.. but either way.. I don't recommend smoking from foil unless you have nothing else around.

All in all, don't let one bad expiriance ruin smoking for you. Wait till a weekend, gather some expirianced smoker friends, and take it as it comes. I garuntee that if you give it another shot you'll enjoy it more then the first time.

Good luck!