Question about ear infections


Hello dear parents. I have 19 months baby he is having frinquent ear infections. Today we went to Er and again another ear infection. Last couple of times we got ear infection without having any cold. As far I know babies get ear infections after cold. Doctor said there is fluid on his left ear. Im feeding him always laying him on his left side. I was thinking maybe it is because of feeding him on that side so fluid drains on his ear and it gets infected. Is it possible to get ear infections feeding them on one side? Do u dear parents had anything similar, having ear infections without cold?