Feel Obstruction Below Sternum While Eating, Belching, Cough, Vomiting With Mucus. No Further Discomfort While Eating.
I shall make an effort to provide you with good professional recommendations specific to your questions.
I understand that your mucus vomiting has got you concerned.
Mucus as you would know is secreted in the nasal sinuses of the upper respiratory tract, as a protective function. If excess amounts are secreted, then the vomit contains mucus as the oesophagus gets laden with it and stimulates the reflux.
I must think of good enough reasons for you, in here - as the conditions causing this include mostly upper respiratory (acute/chronic sinusitis), lung infections, post nasal drip.
If you do not have any of cough/colds/post nasal drip in the recent past - there is yet another possibility that acid reflux from the stomach is the culprit.
I feel the latter is more close to your diverticular history, but this would obviously need substantiation with tests.
I would advise you the following for now.
1. Specialist visit must. (Gastroenterologist or an ENT later)
2. Abandon fizzy/acidic/late night foods.
3. Do not eat and recline soon, keep an hours gap.
4. Get on fluids/semi solid food/easily digestible.
5. Review your diverticular condition to see the present status of gut.
Yet again, I duly appreciate your query to me, I do hope that you have found something useful to help you and I shall be glad to answer any further apprehensions.
Sincerely,