Eek... that sounds like a lot of not sleeping. Can you take a nap when you get there?

No good ideas for chemicals to fix you up, or how to deal with the plane ride... I used to be *terrified* of turbulence. Not so much mentally, but my body reacted as if I were about to crash - lots of adrenaline and stress chemicals being released.

I found a forum for people training for their pilot's license and someone asked about this. One of the responses was to think of it like being in a boat... turbulence is literally just "waves" in the air. If you were in a boat, the waves would make you go up and down a bit, but wouldn't really be much of a threat. The waves in the air are similar...

So, on my last flight, when we hit turbulence, I did 3 things:
1. Imagined that it was a boat, and just some waves that we were gliding over
2. Mentally played a game with myself, guessing how long it would last (about 10 minutes), and I was right!
3. Had a distraction - after I guessed how long it would last, I pulled out a tablet and played games, to distract myself from paying attention to the turbulence. If I noticed it, I thought, "yup, just waves".

Surprisingly, it helped me. Not sure if it helps you, but give it a try (if it's not too late).

Hope you enjoy your trip!