Hi Ya Ya,
Best of luck to you with the surgery. I too had to have it done in parts, and the doctors made me wait 4 years to remove the rectal stump. In those 4 years, it didn't heal, and at 19 I wanted all of the disease gone. I had some complications following surgery, but I never regret going ahead with it, and that's nearly 40+ years ago.
Make sure they use a non-allergic tape. Back in the "dark ages" they didn't, and I developed a serious allergic reaction and had hives wherever the tape had been. I didn't feel the effects of the surgery for days because the itching was so bad. But that too, cleared up.
Because the surgery resulted in bladder damage (lack of sensation), my bladder didn't work for 10 weeks post-op. On a positive note, because I needed a urinary catheter for so long, I was able to keep the incision relatively clean, so the healing was uneventful. Once the bandages were removed, I found it refreshing to expose the incision to air (not a pretty sight I'm sure) but it did help keep the area dry for periods of time. Give yourself the luxury of doing that (even under the covers or sheets) for as long and as often as possible.
I too still have the sphincter intact...which sometimes leads to feeling pressure... like you might want to pass gas, but that's a passing feeling. Also, once you're able to, do the "Kegels" (vaginal exercises) just to get used to exercising the area that was traumatized.
I used a pillow at times, but I actually found the pressure on the incision comforting at times. I know that it sounds strange, but when I got off the bed and started walking, I had the feeling that my "butt" was dragging. The pressure of sitting actually felt good. But then, I had the same reaction years later, after giving birth (vaginally) to my kids. It might be "unique" to me.
BTW, I don't have any kind of "flap" nor did I have extra stitches to keep my butt cheeks together. At the time, they used a very tight "pressure bandage" that pulled the cheeks together. That was probably the adhesive that caused the allergic reaction & the case of hives.
Again...the best of luck to you. Ask any questions you want to ask, and I'm sure someone here will be glad to answer.
Marsha
PS...In case you're curious...it did take a little time to heal, but sex/intercourse went well once I healed. But like all other "rectum-less folks", no anal sex. Although there is some anal area available for playing...but that might be too TMI.