Are you on any other meds? Do they know about your BP?

Can you just not talk at all, keep your mouth shut, during meetings without having problems afterwards or during the meeting (it might get worse if you suppress it or maybe you start to fidget too much, hyperventilate or have a panic attack, so be sure you can hold out for that long). Say halfway through the meeting you have to go to the toilet and just let it out, laugh (not audibly), walk in circles and very fast up and down a corridor (make sure nobody might see you through a classroom window of course). Then go back in.

It's very good you notice these things and realise it might cost you your job. I've always been hopeless with that. I just didn't care. Possessed by mania.