Last week, I had vaginal itching, burning, and a foul smell. I ve had these symptoms before and have went to the doctor and he said I had vaginitis. He said the next time these symptoms occur to take something over the counter such as monistat etc.. he had given me an antibiotic to treat it that day. Well this was last year and now the symptoms have returned. I started monistat 7-day, 3 days ago and the first two days were fine. Until yesterday night, and noticed I started spotting. And today it has gotten heavier along with some nausea and lower back pain. Do I need to go to my OBGYN or is it serious?