Untreated infection long term causes increased risk of Pelvic Inflammatory Disease. this can cause pain and inflammation and more seriously can lead to fertility problems due to blockage of fallopian tubes.
Unfortunately the damage may have been done as early as the three months of self treating so you may struggle to make a claim against your doctor. However in the meantime you need to get diagnosis and appropriate treatment. I would suggest that you arrange a hystosalpinogram which is an investigation to check the patency of the tubes. You should have an ultrasound to check that ovaries are appropriate in size and also that there is no unexpected thickening of the uterus lining.