fortoday I'm sorry you're feeling so overwhelmed at the moment.
You have all the resources in hand to cope, though: you are a strong and capable adult now, no longer a child in her thrall. You are already taking responsible steps to be able to cope, such as going to see your GP for medication.
You have discovered something very valuable: that your life is better without her in it. With time and practice, you will even be able to have a life without her in your mind.
You're going through something unpleasant at the moment - heightened grief and anger at her words, which have cut you, no doubt most of all since they are about your dead father.
Her words are just that: words. Words that express whatever issues she carries. They are not yours to carry. Nor can she be anything other than what she is.
Let her be who she is; don't hang on to the desire for her to be otherwise, as it can only cause you pain. Meanwhile, focus on yourself: your desires, your wants, your limits. Know who it is that you want to be. And all the rest be damned.