I was in a similiar spot like this at the end of September. I had through June and July deposited a total of 600 bucks and towards the end of Sept I was down to 14 bucks in my account! Since then I changed games, from NL to Limit. In a month of playing that I went up to about 150 or so and then played a couple of 5 buck MTTs and ended up placing 4 and 5 in two of them and now have almost won back what I have deposited.

Moral: even though things look bleak you still can do it. You might want to look into changing what game you are playing and moving down levels.