Gonna get a bit graphic, so be warned!
The 'small pocket' that you mention sounds like what I had. Have you heard terms such as 'necrotic tissue'? What happened to me was that part of the wound didn't heal, despite stitching, and I had a patch of dead tissue that was basicaly an open sore just inside my vagina. The necrotic tissue didn't bother me except during sex (ha ha ha - a very effective form of contraception) or if some substances touched it. However, the area around the stitching on my perineum was incredibly sore almost all the time - it was hypersensitive and using sanitary pads, wiping after the toilet, and, sometimes, even just sitting down felt like my perineum was on fire. This was probably caused by trapped nerves, as it was eased by the restitching but only completely resolved by giving birth again.
The op was under GA, but day surgery, so I was home before suppertime. I had stopped bfing by then, but had I still been bfing I don't think it would have been a problem. I don't know what the advice is regarding GA and breastmilk (don't ask your GP, as Mumsnet or the NCT), but I think that I would probably have missed one feed but been able to do any others.
For some reason I had a little room to myself (more like a walled cubicle on the ward, no loo, but nice and private all teh same) and Dh and ds were with me in the hospital most of the time, apart from when dh took ds out to play.
I'm in NW London, and waited only about 2m between being refered and having the op.
If there's anything else I can tell you, please do ask.