One side lip throbbing

I have this problem for a year now.Its painful, eating and talking make pain worse.I have problems with Rosacea, Hashimoto and on diet for Candida after Pylori. I visit two neurologist.MRI ok. They didnt make a fiesta scan for small vessels.Pregabalin doesnt work.Now im on Lamictal 2x 50 daily.To early to say is working or not. While sleeping there is no throbbing.Any ideas.