Help!! Baby has light gray stool??

I’m a first time mom with no idea what I’m doing, so I’m very sorry if I’m being overdramatic I’m just very concerned. My 14 m/o son woke up 4 hours earlier than usual crying. I went to get him from his crib and changed his diaper and saw he had pooped light gray stool in his diaper.

These past few weeks his stool has been pretty rough. He’s currently teething with 3 molars and 2 other teeth beside them. He has had constant diarrhea causing him to rash horribly, but doctor’s just told me to use Destin and he will be fine. But the diarrhea and rash just has not stopped, until this poop. Searching up poop charts on google will say to seek immediate medical attention when white/light gray stool occurs, I’m just not sure if this is the case and really need help and/or opinions on if I should. :(

My baby has always been an amazing eater and did not eat anything out of the ordinary. A couple hours before bed all he ate was strawberries and his nightly milk.

What could this be?

My son and I do not have insurance, and I’m worried of going to the ER just to be told everything is fine, as this usually happens here in vegas.

Do we seek medicial attention, has this happened to anyone else’s baby??? Please HELP!!!!!!