10 mg of 2c-I is a reletivly small dose. if the OP could not handle 2c-I, then he/she should proceed with caution when dealing with any of the stronger 2cs, i.e. 2c-E or 2c-P. maybe the OP should try a light dose of shrooms or a low/med dose of LSD, even though the latter of these would be somewhat hard to dose, some people just can't lay blotter right. well that's my 2 cents
sorry you had a bummer on 2c-I, you're one of the exceptions not the rule

are you sure it was only 10 mg? did you weigh it out or did one of your friends? if so, did you watch them use a mg scale or was it eyeballed? i would suspect that the dose was not 10 mg since most people generally take 14-18 mg