My 4 month old is having mild retractions almost constant & lots of congestion. Seems worse in am. Any ideas why? Has been seen at least weekly.

Needs eval. I would strongly recommend that you take your baby to her/his doctor, mild retractions, almost constant for a week is not normal with a cold and your child should have a doctor listen to their lungs and check them over. It may be nothing more than a cold but best to be seen.