I've used Dr. Guillermo B. Tabar Garcia at 809 583-6467,or 581-4445 with great results.
He is located at Instituto Materno Infantil y Especialdiades, Av. Juan Pablo Duarte, 4ta Planta in Santiago. He is an Air Force Colonel and speaks English, I think, not sure how much. Have had sinustitis for 4 weeks and he helped a lot. Suerte with your condition....I know it sucks.