Could this mean anything or is it all in my head?

Sarah • 29 • Baby Girl #1 11-3-19💕 • Baby Girl #2 2-8-21💕

I was just sitting here babysitting my cousin’s baby and i just got super nauseous all of a sudden. Like it hit me hard out of no where! I’ve been ttc for 11 months now and the wait it killing me. Could this be a sign?