Hi astrobeka,
I wouldn't be too concerned about your snake having not passed a motion, as long as it looks healthy and is otherwise fine, snakes can sometimes particularly when young hold onto alot of faeces and then go.
Of course you do have to think of constipation and other things, but I bet it is something simple.
I reckon it is probably coming upto a shed, as they normally save a ton up, so when your snake has shed, get the shovel ready, or maybe a table spoon in your snakes case!
As for the biting, you should consider yourself lucky, although they aren't that bad a species for biting, not like the Scrubs I used to keep!
Keep us informed if your still worried, but I reckon that's the reason.
Regards,
NCHERPS