Concerned mama

My son will be 11 weeks old Saturday and the past couple of days hes been extra fussy and has been sleeping 7 hrs a night waking up eating and i change him and then he sleeps for 4 hrs and wakes up for about 1.5-2 hrs then sleeps another 4 is this normal?! I don't know why hes sleeping so much :( he just had a cold and hes been coughing alot more :(