Move up. You don't have a huge sample size but it's not really needed at this stake if you're ok with moving back down. Be prepared to take a hit on your redline. It seems like every player at 5nl just heard about this thing called 3 bet bluffing so until you can adjust to that you'll prolly be folding a lot more of your opens than you're used to, at least that's what happened with me. Good luck.