So in this thread there are vet resources.
https://www.chameleonforums.com/threads/veterinarian-resources.67/ and I am tagging
@elizaann2 to share the vet list she has created in case there is one near you. But you find a vet that deals with reptiles at the very least and call. See if you can drop off a fecal sample first before bringing him in. Some may make you bring him in with the fecal to send out for testing. Get the poop portion of the fecal and put it in a plastic zip lock bag. You want to take it in within 24 hours of him passing it.
Yeah this can be normal for some when shedding. See what his appetite does when he completes the shed. If it does not increase then a fecal test is needed.
Supplements would be a plain calcium without D3 at every feeding and then a multivitamin that has D3 and A in it used two times a month say the 1st and the 15th. I prefer repashy calcium plus LoD for the multivitamin. Supplements would be lightly dusted prior to feeding.