Goodmorning, the first thing I noticed is that if got him as a baby he day time temp should be 82f no less during the day and let it drop a degrees at night. You didn't put in what kind of water you use and if your using the wrong water that could playing a big part in your frogs health. Also when you say he gets calcium 2xs a week does it have d3 in it? do you give it any kind of multivitamin? Crickets are not good as a staple diet, they have no nutritional value at all. Nightcrawlers are way better for a staple food. And I know you said your pics came through upside down but if its possible try again it would be so helpful for someone to help. To me the flipping over is a huge concern and I if you really think your frogs health is making uncomfortable or he is pain etc. I would get him to vet as soon as possible. Someone here may be able to help you find out whats wrong but if its serious you will need a vet anyway to get antibiotics.