Cancelling a day trip with girlfriends on Saturday?

Audrey • 31 years old. Mom of one little boy 👶🏼 with another bundle on the way! Happily married since ‘16 💏
Hey ladies I'm at 9 weeks and the past two or three weeks I've been absolutely exhausted. I'm just able to go to work and drive home and I go to bed at 7:30 or 8 every night. 
I have a day trip planned this weekend but now I'm thinking it would be better to stay home and rest. I feel bad because my friends had to change the date for me before and now I want to cancel but I feel like I should do what's best for the baby. Any ideas for a good excuse to bow out? Thoughts? 
Thanks in advance 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors