I am experiencing EXTREME problems with my turbo, I am only getting 2-3 psi and in fifth gear after about 2-3 psi I acutally LOSE RPMS with the gas floored...what the hell is going on???

I noticed a small exhaust leak in the engine comparment that could be a part of the foul culprit...could it be my ECU is getting false reading? Could it be my secondary injectors have ceased to function? AHHHHHHH this sucks, it was running great 5 days ago, almost perfectly, 7-8psi no problem, and now...something is messed up.