I’m sorry you’re feeling so bad. This is a typical GP answer… anxiety… what nonsense. If the symptoms started when you stopped or changed the medication, it’s pretty clearly withdrawal. It could be that your new generic medicine had a slightly different dose than then old one and you started getting withdrawal for that reason. Different generics can vary up to 20% as far as I know. Check out survivingantidepressants.org. The guys there can help you decide weather re-instating and slowly tapering off would make sense. I hope you feel better soon.