My baby keeps getting sick !

I’m crying as I’m writing this. My 4 month old just got over a upper respiratory infection. He was so miserable! He’d gotten much better for at least a week. A week goes by and he’s sick again. The culprit is the daycare he goes to. No one else in the household is sick . He’s barely getting any sleep through out the day & when he comes home. He’s waking up every hour/every other hour because he’s coughing or congested and wants to nurse or comfort nurse. I feel so awful because I can sense that he’s really tired. He hates the saline drops and the nose suction, but that’s the only thing that tends to help! If I could be a stay at home mom and just take care of him I would ! ❤️