Trying to pick my words very carefully as I am not a woman and offering advice.
I've been operated on 6 times for a strictured urethra. Pain and burning while urrinating and afterwards is just a part of my life as none of the urologists can give me a permanent fix.
I'm just throwing this out there as a possibility that your gyno or a uro can check. (After my expirience with this, I hope you don't have it). They use a cystoscope (???) to check the urethra if I remember correctly.
And I apologize if I have overstepped my bounds.