Thankyou for your question.
This situation is one where I would take my rabbit to a vet right now.
This rabbit has the signs of a rabbit who is in severe distress.
When the GI tract shuts down in a rabbit the rabbit starves to death.
This problem is often seen and could be prevented through high fiber,low fat,low protein diet.
Please note,this could be another type of situation but your rabbit must be seen immediately or this condition could be fatal.
Here's a website which can help you prevent sickness in future situations and it lets you know what antibiotics should NOT be given to your rabbit by a vet.
Please let me know if I can help further?