twice in the last week I have choked and not been able to breath. The first time I was drinking water. It had a orange rind in it so was not sure if I accidently inhaled part of it. I could kind of talk but could not get air in or out. Eventually I as able to take a breath again, Bending over helped me breath. The second time was tonight took a bite of hamburger and the same think happened. Not sure if I could breath at all but it felt like I could not. My husband tried to do the heimlich don't think it worked but eventually I could breathe again. Again when bending over it seems to help. The lack of air is coming from mid chest. I have felt short of breath the last few weeks and put it down to allergies. What could be going on?