Well come to health care magic
Dear patieny, hope salads don't cause allergic reactions , this problem of lump in the throat and nusea seems to be more related to your acid reflux
problem which might have got aggrevated by the pain killers that you took after surgery , if you feel that the pain is persisting there and you have vomiting
also along with nusea then you can go and consult a doctor , other wise if you are feeling ok, you need not to worry, just make sure that you don't eat too much of spicy foods .
Hope to see you feeling better soon