Have PID finish meds. Dif pelvic exam and doc said down there inflamed. When open lips of vagina there is line going down and it is red from top. Cau?

Maybe Yeast. I think you asked a question yesterday about inflammation. That's great finished meds. When you open lips and there is a line of red, that could be a yeast infection, which is common to get when you are on antibiotics. You can get a check from doctor to confirm, or you can try some otc anti-fungal.
See an OB/GYN. Sounds as if there may be a secondary yeast infection, but the best person to determine that is the doctor who did your pelvic exam. If you cannot get a satisfactory answer, get a second opinion. Good luck.