I had PRK done in 2016, hands down the best thing I have ever done for myself. I remember having incredibly blurry vision for about three days, which improved significantly over the course of the first couple of weeks. The biggest thing I remember from the post op period was the starburst from lights at night (which is something I still suffer from, just not as severe as it was).
Sorry to hear you are still having negative side effects at the three-month mark. I think the point made by your surgeon is spot on though, your eyes are going to continue to heal for at least another three months! I will say that my vision is still 20/15 nearly ten years later, and the only real thing I still suffer from is the starburst; I would do it all again in a heartbeat. Hang in there!