This is a most unusual story.
Who diagnosed the right sided Trigeminal neuralgia? However let us assume that it was the correct diagnosis for the moment.
Recurrent trigeminal neuralgia ( if true) on the opposite side, is quite unusual.
The pain could well be coming from the temperomandibular joint, but only your doctor who is best placed can say.
Difficult.....continue with the doctors advice and reassess the situation tomorrow.
I would have thought that Ibuprofen 400mgms taken now, might be of help, with the Paracetamol.