damn! that really is a windfall. i went to college, worked and saved up on a wall st floor for four years, quit to trade a year ago, have made almost 60% on my acct, and I still don't quite have what you made in one or two seriously amazing trades.
a small handfull of trades isnt the best sample, but i wouldnt doubt that you probably have strong innate ability, and you sound pretty cool headed about it all which is good. my recommendation would be to stop trading immediately, go to school, dont major in business unless it was what you were planning on all along, think about your profits and your trades for a good while, and maybe start doing some EOD swing/position trading after you've cooled off a little on those insane returns. the opportunity cost of sitting out isnt anywhere close to the cost of overtrading or gambling away your easy success ... and the pain of losing all that money. you got way too lucky to toss it away. that would be a huge tragedy considering what it takes most beginners to establish a stake like that.
or maybe you can be the cowboy and quintuple it again. what do i know? either way, i would think hard about what really happened.