Excessive mucus after food intake (became my phobia)

[keweiUTP]

Hi people, greetings from Malaysia. I am a 23 years old and I have had excessive phlegm/mucus (sometimes with tract hair) since 13 years old. In the early years it wasn't that terrible but it's affecting my lifestyle now. I almost had this issue every time after I eat spicy/oily/extremely sweet/sour food or drink almost everything other than hot mineral water/tea. Consuming them irritates my throat so much I usually have to clear it for 15-20minutes. What's even worse is that I am a shy person and convinced that I have social anxiety issue, so the need to make annoying throat-clearing sound embarrasses me. I tried not to do that, and it eventually leads to s strong urge to throw up, often spitting out mucus and saliva in toilet. Now I am afraid of public places, even visiting shopping malls or cinema is terrifying (unless I am near to toilet). Besides that, I feel that this throwing up issue has also somehow link itself to my fears. This means that when I am in the state of fear/anxiety (eg. before public speaking or conversing with superiors), my throat will automatically secrete excessive mucus and I will then have the strong puking urge, affecting my performance. I am not sure if this need to be treated psychologically or physically. Self-talk did not help much.