FTM freaking myself out

Disclaimer, not trying to ask for medical advice or anything, just wondering if any other moms have had experience with this. Our baby boy is 4 weeks today. At first his eyes were too dark to really tell but last night I thought I noticed that one pupil was bigger than the other. Changed lighting and it seemed to be the same size. Today again I'm noticing it again so of course I was *that* mom and googled it and basically it can be either nothing or Horner's, which can be either nothing or a nerve problem, or even cancer because in google medicine world anything can be cancer and it's your punishment from the universe for worrying too much 😂 but in all seriousness I am just a little worried. We already have a routine check-up with his pediatrician scheduled for basically her first available time after the holiday and all...I just thought I would check in with the village and see if anyone else's littles had anything similar and what it turned out to be.. Thank you very much!