My three year old guinea pig just started making some odd noises about five minutes ago. It sounded like his stomach was grumbling but he's never made noises like this before. When I walked up to his cage to investigate he made an odd whining noise. I assumed that he was hungry so I gave him some food but now I'm worried that he might be sick. I don't have a vet for him and I can not afford one so if he's sick I'm screwed. Any suggestions? My current plan is just to wait and see if it blows over withing the next twenty four hours.