Sick kitten Help

Five weeks ago I rescued a kitten took him to the vet was about 10wks old and in good health he received his first shots. four weeks later he was showing signs of not eating or drinking he would no longer play. I took him to the vet he had a fever of 104.3 the vet tested his blood and could find no cause for fever. He put him on antibiotics for 10days and said it could be viral. Two days later I had to rush in to the vet he was not responding to me (very lifless), his fever had spiked to 106 the vet gave him a shot of steroids to bring his fever down, he would only eat if I keep bugging him and only from my hand, he drinks lots of water and was useing his litter box normally, his fevers have gone down day by day and it has been almost a week. But now his stomach is bloated it is not hard to the touch and does not seem to bother him if touched, but he is not pooping regular as before I realize he does not eat much to have to poop but he has not eaten much at all in the past week maybe 5-15 pieces of dry food a day. Does anyone have any suggestions on what my be the propblem he is a great little guy but it is so hard to see him like this. He has a vet check up tomorrow and will ask about the stomach bloating. I just keep praying he will get over what ever it is he has and be a healthy playful kitten.