Big leak in my mid-level play.

[Calpeman]

My problem is that I get way passive at the mid levels of the STTs. I play at the 20+2 level. For example if I have T1500 at the 50/100 level, I find myself playing even tighter then the first three levels. I rather sit and wait for my stack to get down to 8-10BBs where I start pushing. I think this leak probably is a result of not having enough confidence in my post flop play.

How big is this leak and has anyone else experienced the same? If you have what did you do to get over it. Any good rules I could start following at this point as I feel totaly lost at the moment.