When my baby laid eggs she was so exhausted she couldn't climb back up. So as soon as she had finished I left her an hour she still hadn't managed to get back up, so I picked her up put her under her lamp and she was really hungry an thirsty. Definitely bugs coated with calcium!!
She looks rather plump to say the least, if she is carrying eggs and grip still weak I'd say she may need a shot of calcium prior or after laying to boost her slightly, from the vet!!
Could do with some more pics online different angles really .
Reptiles/animals are all individuals just like humans, not one animal/reptile/ human grow the same. Like others say there could be an issue but again might just be a slow grower may have growth spurt due etc !!
U could try to Inject a feeder with the meds and then feed right away before the meds kill the feeder,
Or wait until ur cham shoots a cricket or feeder and while they're chewing on it try squirt it into their mouth real fast.
If you want to or need to force the mouth open I would suggest...
The white section in her poo is urate which is urine, and it's means she's hydrated all the time it's white. If it changed colour u need to give more fluids x