Thanks for the extensive answer.
Sharon fruit has many names you might know it as persimmon fruit.
Lets fill in some blanks. This persimmon came from Spain they are at least twice the size as the same fruit from Israel. I never tested the real ripe ones they are so delicious and sweet you just know they are exellent.I found a better word for bitter, the tast was Acerbic. My mistake was that I brushed my teeth five minutes before eating the fruit and I blamed the aserbic taste on the toothpaste. Untill I got this strange reaction. I think your right in your analysis Moreless.
After spitting slime and a feeling of my throat contracting and chestpains I got my act together. COMMON SENSE told me " actually my only thought was take some sodium bicarbonaat " and it might have been only a few seconds that the symtoms disappeared.
Here is a link about sharon fruit some people get real allergic reactions.