Hi Miss W, if your plumbing is hooked up as natural, did you get a J-Pouch? Did they just do a straight line hookup to your anus? They are both difficult for quite a while, sorry to say. I had the J-Pouch irritation after getting it and disconnecting it.
I got something in Ireland called "Instillagel". This is basically like Novocaine. It comes in plastic syringes for inserting inside. This will take away your pain (localized) while the Vaseline protects from further skin damage. What's coming out will literally burn the skin around the anal area, mine was like raw hamburger, raw and bloody at times. I feel for you because I struggle to describe the intensity of this pain!!! It is the most awful pain I've ever felt.
I assume your frequency is off the charts right now, so anything to neutralize the excess stomach acid will help. I had a lot of pain and cramping in my lower pelvis, gripping, pulling type of cramps. Any type of muscle relaxant may help with those cramps.
Bottom line is you will be dealing with this for a while, so try everything that's feasible, the sooner you find something, the sooner you will have that lovely smile back.
Sitting upright as little as possible helps, stretch out with a cushion just where your buttocks begin, under your upper thighs and not sitting directly on the cushion.
If your frequency is very high, sending out copious amounts of stomach acid, you could try Imodium to slow it down.
You will have inflammation inside your anus/rectum. There is a steroid foam that you can squirt in there, a little canister of compressed foam steroid. This works best for all the above. The one I used (steroid) is called "Colifoam". This brand is European, so the name may be different.
Magoo