Frog all of a sudden not eating :/ why? (inc pics)

[reptifrog]

hey all, since the past 3 days my pacman hasn't ate all of a sudden and just saying burrowed, he use to eat great around about 6-8 size 4th crickets on the days he/she was meant to eat (going by the Calcium d3+vit calendar I seen on here, little guys at the back) and could it be it's full as I haven't seen it poop yet, iv seen It wee before now and soak into the substrate and iv felt its belly and its soft unless he/she tenses up ha here is about the tank

30x30x30cm or 12"x12"x12" exo terra tank, kept in my bedroom
1x Boston fern
(artificial)
1 x grassy plant
about 3"-4" coco fibre substrate
50w IR bulb on a dimmer
daytemp 27c-28c / nighttemp 24c-25c
(using a digital hygro/temp sensor)
humidity 75%-82% (damp towel on top to help)
small water dish with few slate in there with bottled water, changed regularly
misted if needed with bottled water
2x slate for decoration along with the polystyrene background
its a juvenile ornate had it nearly 3 weeks