If you have been seeing a condition for three months, it's time to get to a doctor to have them take a look- pictures of a condition won't help get an accurate diagnosis, so get to the doctor where they can ask you questions, get a better idea of medical history (not just sexual history), and do an in person exam. It likely is just an irritation, and you may need to make sure to keep the area clean- but a doctor will be able to tell you for sure.