Dropping Back Down

[usi34]

Not sure if this goes here but I'll give it a shot, if this is the wrong forum please direct me to the right one and i'll be glad to go there, but i feel some psychology is involved.
Here's some background. Im a 19(turning 20 tomorrow) sophomore in college. About 5 1/2 months ago I started bonuswhoring. I worked my way around building my bankroll. Recently my girlfriend went out of town and I had a lot more time to play. I turned my $3500 bankroll into about 18,000 in a little over a month. I always play NL, usually .50/1. I took a shot playing 2/4NL and it paid off. I got to 12,000 and started playing 3/6NL. I continued doing well.

Every once in awhile i would sit down at the 5/10NL table. By the time I got to 18,000 I found my self 3 tabling these 5/10NL tables. I won at first but recently have dropped about 3 buy-ins. So now I have a little over 15,000.

I just dont' know where to go from here. Losing this 3,000 hurt. Although I am financially secure, it just made me feel really bad losing this money. I'm still a huge winner and have a nice bankroll for someone my age.

Do I drop back down to 3/6NL or 2/4NL until I get around 20,000?
Do I take a few weeks off?
Do I keep playing 5/10NL?
or do I quit complaining like a bitch because I've lost a little bit of my bankroll?

Any advice would be appreciated.