Help! Baby losing weight not eating

[Allana Masters]

Got this guy/gal 1/1, we were told he was 4 weeks old. He was tiny. Well, not much has changed, size size, but he has gotten really skinny. He was eating 15 Dubias a day, and that would fluctuate, stopped eating when he was shedding (which has only happened once, about a month ago) but then was eating normally. About 2 weeks ago, he slowed his eating, and the last time he ate, it was 2 dubias, about 5 days ago. I put him in his weekly bath, and he pooped, but it was white and clear, no black like normal. Nothing has changed in his life, so I'm not sure what happened. I did notice a little ouchy on his finger, and his hand looks bruised, but that was about a month ago.
He has gotten super skinny. I am really concerned. Not wanting to take a trip to the vet right now, as we need to save every penny due to this virus and being forced to stay home.
Any ideas what could be wrong? Could his hand be hurting? What would a vet do?

 

[Allana Masters]

What size tank? What are using for a UVB brand and bulb coil or tube? What are the basking temps and how are you taking them? No stick ons they are inaccurate! It is common for them to go thru relocation stress- but not to completely stop eating- please post pics of the tank and lighting

100 watt daytime basking in a 50 gal tank. He was in a smaller one. But it broke. 16" from heat source on basking surface, stays on from 7am to 6pm, then a night basking lamp. 15watt UVB bulb during daytime.