11w old hasn't pooped in 2.5 days... Help!

Kit

Edit: nevermind.... Apparently me asking triggered his butt into action. We have a full diaper!

My son is formula fed (I take meds that make it unsafe to bf) and I know it's normal for him to go less than a bf baby but two and a half days?! I have a call into my Pediatrician but anyone have any advice??

He doesn't seem in any distress...