Savage Race at 9 weeks pregnant

Catherine • 33- have a beautiful 6 yo DD and so excited that she is going to be a big sister in December 2016!
I'll be running a Savage Race at 9 weeks (May 7th)- and the closer I get the crazier I feel for doing it at 9 weeks. 
Anyone have experience running OCR's pregnant? 
My main concern is I usually have to use my midsection a lot to hoist myself over walls, and the impact of the Davey Jones Locker jump (12 foot jump into water). 
Suggestions? Admonishments? Aroo? 
And if any mommas on here are running Savage Race MD that day, I'm running the morning heat!!