First of all, there's really nothing wrong with sleeping before you take a shower. Your ancestors went entire months without one with no serious problems.
From the way you are speaking, I think the first thing you need to do is examine the area with lots of light and a mirror to eliminate surface problems.
Now if it is NOT a skin irritation, it could be that your squishy seat has you actually hurting your cocyxx bone. If that is the case, you need a bike fit.