NOT EATING

my little texan has been doing fine sense i got him in july. but last week he eat fish for the first time. he loved it. the next day he caught one in his tank on his own an ate it too. but sense then he hasnt been eating anything. im real worried. ive tried all the stuff he normally eats. reptomin, dried shrimp, cricketts, more fish, and today tried ghost shrimp. still no luck. this will be day 5 i havnt seen him eat. he hasnt been acting much different other than his intrest in food. please help.