any good players having trouble making money online?

in the beginning of the year i was unstoppable. no matter what web site i went to i always atleast tripled my investment. the last couple of months have been very cold for me. i don't know if its me or what. i've had swings of 3k up and down over just a weekend.

my main game is 1/2nl even though i do like to try higher limits sometimes. i play more tournaments then i should. tournaments for the most part are just recreation for me. i'm just not sure where to go from here to improve my game. any help would be appreciated.