Since last night my cat has acted very strange. He is 5 years old. He makes that really low meowing sound like cats do if they are mad and hissed a lot. He licks his private area a lot and doesn't move around much or eat. If you call to him he used to come to you right away but you can't get him to do anything. What could be wrong? I'm afraid he may be really sick but I have no money to take him to the vet... what should I do?