Talk to Gynecologist on Lactation Consultancy

My baby is 45 days old,she is 90% on mother feed.problem is my milk flow is very fast and she is unable to control it and chocks very badly.it is increasing with time.and from yesterday she tries to drinks it and chocks or end up unable to manage the flow and leaves.and then start crying,no matter how hard I try to offer her back, she refuses and go for bottle.I am very confused what to do? I tried expressing ounce first to slow down the pressure,but it didn't work.