You're running hot if you just managed to cash 12 in a row but try not to get ahead of yourself and think that because you managed it that it will contiunue, as it won't. You're just as likely to go 12 in a row without cashing (and many more in most cases)
Stick to $1.00 games, even this is under rolled but possible. Going to $3.00 is just suicide, you only need to lose 2 or three in a row and have lost half your bankroll.
IF however, you can quite easily reload, then go for it...(then again just deposit the correct amount in the first place to play them)
PS: Is this on pokerstars
? If so, cashing 11 in a row will highly likely get you on the low orbit leader board, get a couple of wins and you could well win enough money in prize money in batttle of the plants.