Hi and welcome to Healthcaremagic. Thank you for your query.
I understand your concerns and I will try to help you as much as I can.
I don thtink this is related to breast and this is more likely to be stomach issue. It may indicate a condition called hiatal
hernia and this is the first thing tobe considered and this means that stomach is protruding through diaphragm muscle.
It may cause breathing difficulties,
nausea,
swallowing difficulties and irritation of stomach. It will also be aggravated by certain food or medications, stress and
smoking. You need to avoid fried food, carbonated drinks, coffee, alcohol and spicy food. You should eat more milk products, vegetables and boiled food. Also, certain antiacid medications may be required and as last option, it is possible to perform surgical repair of hernia especially if there are progressive respiratory discomfort and
dyspepsia. To diagnose it you should do gastroscopy and if this is negative as in your case then you should do contrast xrays of stomach.
I hope I have answered you query. If you have any further questions you can contact us in every time.
Kindly regards. Wish you a good health.