I would imagine that would be a very hard situation and both you and your mother have been victims of Cymbalta.
I have only really had to deal with my hubbie and since he is a farmer he is very busy right now. He was very good with the physical Cymptoms as well, but our support people cannot see inside us to see the mental auguish that we are dealing with. He's not so patient now that there are no obvious physical problems.
It would seem that the physical part of stopping was only part of the battle. The mental problems are not so obvious but take much longer to deal with and heal. As with any chronic condition, dealing with the day to day part of life is difficult enough without a curve ball like Cymbalta coming at us.
I try my best to do the things that need to be done around here but dealing with Cymbalta withdrawals on top of years of Chronic Insomnia has made life very difficult. The other day before hubbie left I gave him a kiss and told him "I am apoligizing right now for any and all screw ups I make that aggravate, annoy or delay you today". His reply "I'm sorry if I am impatient with you today" Funny thing is that by reminding him that I was still having problems took the pressure off me to be perfect and neither one of us ended up feeling bad that day.
Now I know that this isn't the same as you and your mother, but somehow you need to take the pressure off of yourself about screwing up. My mother and I used to write letters to each other when we were living together and had argued or things were tense between us. We both were too emotional about stuff to sit down and talk things out.
You have been given a tough load to carry chimera and your mother probably understands more than you realize.
Take care of you and hug your mother. She's earned it.