Freaking out a little here

Okay so I’m 26 weeks and I have one thing that has happened to me over the course of the last 2 months almost always..... the outer layer of my vagina is SUPER SWOLLEN! I mean it feels like I have a baseball down there and it burns and itches like crazy. That being said I have taken MULITIPLE SESSIONS of antibiotics bc my doctor and I both thought uti well the work for about 2 days and I’m back to square one even with finishing the rounds. I’m so sick of it and I don’t know what to do. I have even gone as far as putting an ice pack down there to get the swelling to go down no such luck with that yet... please can anyone give me any ideas on what to do or how to even approach the fact that nothing has worked to my doctor ????? Sorry for the tmi but it is needed