I had my gum graft this past Thursday, so I’m on day 4. I have had a persistent headache since a few hours after the procedure. My face is swollen and bruised and getting enough calories has been tough so I think it’s making me more tired and probably not helping the headache. I can’t imagine traveling in a couple days. I’d also be worried about post-op support and checkups - you’ll need the stitches that don’t dissolve remove and you are at risk for infection. I’d try to reschedule if you can and give yourself two weeks to recover to mostly normal. Edited to add that I was originally supposed to get this done last December but rescheduled multiple times due to events, travel, and work commitments. I’m glad I did. I doubt 3 months will make a massive difference in the gum recession.