11 month old

So my son has been having bad congestion due to the weather change and I been giving him meds and trying to break up the mucus in his chest. Now his nose is draining but it’s like a yellowish tent and he’s been running low grade fevers for some weeks up and down. I’m thinking because of his teeth. Now it’s bad to the point he can’t sleep long cause he’s too congested and he keeps whining and crying. I feel bad for my baby. I thought about emergency but i assume it’s nothing they can do. Help?