6 week old does not sleep much during the day!

My 6 week old maybe sleeps an hour totally all day! Ever since he got RSV at 2 weeks old he does not sleep at all during the day! He is supper fussy all day but I get him to sleep and he wakes with in 30 min. And it's a process to get him back to sleep. I have three other kids and he hates the swing, my front carrier u name it. I'm really starting to get concerned that he isn't getting the sleep he needs to grow ect! HELP! I don't know what to do anymore!