What Causes Suffocation And Constant Coughing On Intake Of Food?

Hey doctor, I am searching for an answer when I came along with this page, I wonder if you can answer my question. Everytime I eat, no matter how much, I feel suffocated and it s hard to stop coughing, it has been happening for the past month or so and it is causing me to lose weight because I prefer not to eat rather than this suffocation , it always happens after I eat and usually when I am going upstairs, is there a reason for this? Or is it in my head? I am a 21 year old healthy woman, I don t smoke, no alcohol, no drugs, not over weight, I don t really know the cause of this please help me, my family thinks I have anemia (I have never been diagnosed) because my hands are always cold and my nails usually turn blue when I feel cold but I don t know if this has anything to do with my suffocation. Your help is greatly appreciated.