I don't know a lot aobut counseling someone, but I was always told that even if you have a bad day, try to remember something good from it, no matter how small. Was your son happy today? Did you get a chance to see his face when the cake was lit, presents opened, etc.? Try to use some of these things to get you thru. It sounds like you were making some progress, so try to stop or limit your backslide. I know that I am not one to talk, I was told to limit all physical contact with W unless she initiates it. That lasted a whole hour or so. I needed to give her a hug and in turn it was likeing hugging a rock. So I started to get all depressed, but then remembered what I was suppose to do and basically ignored it. I have included my thread, take a look at it if you have time. Maybe we can help each other get thru this crap and turn out to be better people. Even if we do not get the end result we want, we can at least be happy with who we are.
