Not sure what arrangements are made with PAI but in no particular order I'd suggest.
Take a media player you can hook up to TV
Take baby wipes with you
Extra long charge cable for your phone
Plug adaptors
Buy a big data sim card on arrival
Install Google Translate, Google maps & Uber (if you fancy going out)
Install My PillBox (android app or equivalent for med reminders)
If you need your own groceries Tesco Lotus deliver
Take lots of cheap knickers (think I took about 30)
Couple of skirts and a half dozen Tshirts go a long way
Bring any vitamin supplements you usually take in case you can't get equivalents
If you need to change money in Thailand take your passport with you
A 1 hour full body massage at the medical school in temple of the reclining goddess is amazing preop (to physical for fresh postop)
On the way home take the wheelchair
You probably already have but read up on trips from others as they can be full of extra ideas.
With the generic warning of - Don't try this at home kids!!!! (You're a big girl and self med so you know the risks and I'll tell you straight)
Depending on your own situation you may want to take your meds with you. I took mine with me and got my surgeons permission to resume my meds after surgery.
Apart from that have fun and enjoy what you can