My 4 month old son has a cold, stuffy nose and a bit of a cough, he's fine in himself but gets upset and frustrated when tired and not sleeping well due to blocked nose, he's also come up with this spot like thing on his lip? Is it worth a gp visit? He does suck his top lip in so wondering if it could be that? Also any tips to help him sleep, he can only sleep upright in the carrier at the moment... Thank you