Normally I would tell you to follow the doctor’s instructions but it seems paracetamol is acetometaphin which is very toxic to cats!!! However, without examining your cat it is impossible for me to really give you any advice. My recommendation is to try and find a vet you trust because your cat needs treatment.
Good luck
Dr D
This sounds like a potential blockage. Please get your dog to the vet NOW…DO NOT wait on this. Blockages and obstructions are usually fatal if not handled quickly.