Yeah you definitely gotta take some time off until you get your head right. I know from experience that if you are "playing scared" or lacking confidence, you are almost guaranteed to lose your money.
It really sucks, but sometimes it is just variance. If you play long enough, you are going to take bad beat after bad beat in big situations, and as a person, you become paranoid and cynical. You start feeling like you can't win unless you get the nuts, that every coinflip is going to go the other way, and some people even begin doubting online poker. Just try to shake it off, and get back to your regular ways of making the $