Traveling a total of 18 hours high risk

My friends are getting married in Tennessee and I’m the maid of honor. Here recently I found out I’m pregnant. I’m high risk as I’ve had 3 prior miscarriages to this one. Baby is doing good and heart beat was found but I’m still not in a “safe zone”

The wedding is on august 17th and it’s 9hours there and 9 back, I’m concerned about traveling while being high risk

I have a ob appointment on the 5th (next week) and I am gonna ask my doctor about traveling but I would also like some other opinions.

1. Is it safe for me traveling that far being high risk (husband is driving)

2. Is there any precautions I can take to ensure a safe travel

Any and all advice or suggestions are welcome

This is my best friends wedding (literally both party’s are very good friends of mine) and I don’t want to miss it

Traveling from Florida to Tennessee