Jiffer, the woman who gave you that advice was not trying to be condescending. When you get a chronic thing that zaps your strength, no matter what it is, sometimes you have to readjust your goals. And whether you want to believe it, or not, your identity is wrapped up in cycling. I know mine is, and I don't compete! Look how upset you are that you can't do what you want to do. Most likely you will recover and find a way to race again, but you might have change your expectations for awhile, while you figure this out. What would happen if you really couldn't race again? I know how you are feeling when someone tells you to find something else to do. My rheumatologist told me to ride my bike 5 miles when I was having mysterious medical issues that no one ever figured out. I was pissed as hell, but at that point, I couldn't even do that. The truth is, while I am mostly back to where I was, I can't do what I did before, without making myself sick from over training. And I am 4 years older.
I decided a long time ago that I am never giving up cycling, but every ride can't be about speed. And when you are always around other fast riders and racers, it is hard to be kind to yourself when you are not feeling well and struggling. Before I used to think, well, they are just stronger than me. Now, I know that I am not going to be like them. Ever.
You will get it figured out, but sometimes it helps to take a step back and do some other activities while that is happening. I never would have done yoga if I hadn't been sick. Not only did it help me get better, it is a perfect complement to cycling. I'm not saying that you should do this, but you should find something you love, in addition to cycling.
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport