Yea they can definitely be connected. Erica sometimes gets an upset tummy while teething, a low fever, extra sleepy but hard time falling asleep.. I'm sure its normal. Reminds you how thankful you are to not have a baby who spits up all the time anymore tho huh? Erica used to get so sick when she was really little, I'm glad we're past that stage!
I hope little Hannah feels better!!