I'm sorry
A relationship breakup like this is a triggering and sad life event (obviously). I hope you find something (or someone) who can help. A breakup is worse if it's unexpected too I guess (I broke up with an ex fiance which was hard and hurtful but since he was abusive..... it would have been worse to shack up together permanently
It can help to remember there are other people out there who you could also get on with maybe (but this would take time). I'm sorry the professionals are not more helpful.
(I understand this....) I am sure there will be people who will suggest a ''med change''... I think DBT would be more helpful than ''meds only'' (or some minimal sort of ''professional support'') as far as ''treatment'' but I don't know the situation that well. Hugs. People here will listen (for what that is worth..)
And.. nobody is hopeless.