Normal
Definitely nothing to worry about, these guys go for ages without eating. Yours looks chunky too I'd just keep the water dish full. That bald patch can be a good thing when you're waiting on a moult. The skin on the abdomen will start to separate, this makes it look black or bruised, so it's a good indicator of how close it is to a moult. Keep in mind it can start refusing food months before a moult. Looking at how pink the abdomen still is it could be a while.