Hi, I can understand how you feel because yesterday I was very frustrated. Maybe is not your "fate", maybe it is, but one of the most important things is to know what you really want in this moment and don't give up.
I will be 28 on September, and I have played piano for more than 10 years. I did also an admission exam this year, but I didn't pass it and my grade wasn't so good.
I can tell you which were the factors of why I didn't pass but there are many. However, one of them is that I need to work harder and know how to improve my technique's faults.
Thanks to this exam, I became aware of my faults and I am looking for an way to play better, to obtain the level I should have according to the years I have taken piano classes. This is my current goal right now, so I won't feel embarrassed when someone asks me.
To tell you the truth, I am also not sure if I can become a professional, specially due to my age, however, I always seek people, books, events, exams or workshops which can give me the chance to grow up. Some have cost (even expensive) but others are for free.
Just don't put all the eggs in only one basket. Think in other career or job opportunities which can sustain you in case there is a problem with your career as pianist.