Travel at 37 Weeks

Aliza
My husband's birthday is the day after thanksgiving and he wanted to do a weekend away with a couple of friends. My (insane and inconsiderate) sister in law got involved and now we are renting a house with 14 people, a two hour drive from home. She did not consider that I'll be 37 weeks and a 2 hour drive might not be easy for me or that it will SUCK to share a house with 14 people that only has 2 bathrooms. 
I want to be with my husband on his birthday and I hate the idea of not being there but I wonder if I'm being foolish to try to go. Any thoughts?