It's normal and it takes a while. It could also be part of withdrawal. Everybody is different, which is why it would be so important to find a better doctor.
Once you are through it, it will get better, but........ only you can make that first step to get through it.
I'm sorry about your Mother, she is or was feeling just like you and the rest of us.
Do you have friends or other family member that can help?
Don't start thinking about the bad things when you stop drinking, start counting up the good things and what you would do if (when) you become sober. It is possible.