Yeah men can be real trashes at time! I am sorry to hear that.
Anyway, you could perhaps go see a specialised doctor and talk to him/her, and see what they'd have to say, a GP isn't always reliable, so might need an expert in neurology or the same line of expertise, to 'evaluate' you in case anything like this arises. This way if you know in advance what's going on, then you could eventually have enough time to think of a Plan B.
If you know a specialised doctor it'd be even better, perhaps.
Check also if the medication is prescribed to mentally disturbed individuals, and check online on forums maybe if you can find anything related to your case. Talk to people who've been through the same experience as yours, as well.
At the same time, find things against him, it's fair play, he's trying to play with ur mind then do with his as well.