Hi Fito,
It's normal to feel the way you are feeling right now after going through all this - Hell! Who wouldn't??.....Not a simple fistula to deal with but abscess, fissure, fistula & then abscess again all in one......Don't forget the most of us here tend to deal with one or the other and generally not all at once with the complications thrown in on top - I'm so sorry to read this and all the pain you are going through. Right now it must be tough without doubt.
Your CRS is probably right in advising you that your pain levels will be high, certainly maybe higher than the average post-op recoverer because you have been through a lot, BUT, and it might not feel like it right now, as healing begins in that area, it will get better for you with time and hopefully a couple of weeks from now, you should be starting to feel some relief....As hard as it sounds, you really do need to "rest it out" now and have faith in time helping you to heal.
Are your stools so soft when you go to the toilet that they can literally "fall" out by themselves at the moment??? If not, you must try to get them to this stage to help you with your healing - It's vital you eliminate as much excessive stress on that tender area as much as you can & rest in the most comfortable position that you can, off it - Are you working? Are you able to take lots of rest right now at home??.......
Are you taking a stool softener?? If not, see a Pharmacist or GP & ask them to help you - Make sure you are eating all the right things to produce a 5 or 6 stool right now:
http://en.wikipedia.org/wiki/Bristol_Stool_ScaleEliminate white flour (breads/ pies/ biscuits/ pasta/ rice) - Make sure everything is brown....Fruits, veggies, salads galore & more water than ever...Limit cheese & eggs. Apple purees, soft cooked carrots & veggies, porridge oats, beans, olive oils are all nice & soft & help produce very soft stools. There is so much information on this site as to what you need to be eating right now. Please look for it.....
Also clean up with a shower head rather than any form of harsh rubbing with paper and I'm guessing as you have a Fistulomy wound, you really need to just keep it as clean & dry as possible to heal properly.
Gently applying a big dollop of Vaseline to your anal opening prior to a BM might be very helpful for you too to help lubricate the area more....
Do you use a heating pad or hot water to aid your pain relief?? Sitting on them can be wonderfully helpful & relieving & it also helps the healing process too........
The way you are thinking will change as you get better and the pain starts to reduce - Again, it really is normal to feel this way when your bottom is causing you so much pain....Try to distract yourself as much as you can through books, music, films, meditation, computer games - whatever helps you take your mind off everything for a while. Try to tell yourself all the time, right now, that this is temporary and it WILL get better and turn a negative thought into a positive one....instead of "can't handle this", try "I am handling this........and it won't always be like this"........It's amazing how the mind & body can work together to heal. (and they will)
If you're finding it difficult, talk to a regular GP about the way you feel & they might offer something new or a different approach. Hang in there & stay strong........It's hard to see now, but it will get better & don't feel alone because there will always be someone going through the same thing as you somewhere.
Take Care, look after yourself & all the very best in feeling better very soon.