Ah yes, I really hope the new sleeping position works for you. Nothing like waking up sore and unrested! My drain removal was cake, I had a Penrose drain which was essentially a plastic straw sticking out between my cheeks. It sorta just fell out, she barely had to pull but I was nervous so I did take a hydro. It could be drainage, as sometimes the body has more to drain than goes into the drain tube, could be sweat or it could be your nerve endings playing tricks on you. I had feelings of moisture, like dripping wet, but it was always dry. I think my nerves weren't quite matched up yet and my brain was interpreting those signals as "you're wet!!" I understand your anxiety about the bottom part, I so do. Once you get the bandage off roll up gauze and stick it in your cheeks to get some air in there, and be sure you are getting enough vit a, e, c and zinc and up your protein while you are healing. All these contribute to tissue building and tissue healing.