I understand very well what you say, since for me anxiety was also something i thought i could never be a candidate for. Turns out ive had anxiety for a long time, not in a continuous way, but has definitely showed up several times throughout my life. For some reason, i also didnt notice or realized. I noticed depression first. But then again, just not too long ago, i realized i had depression way before i thought i had my first episode. For both anxiety and depression, i think it's because it first manifested itself in a non-classical way. It can take different forms. When i was little, i had ocd (just realized this as an adult) and i cried ar bedtime and had a lot of fears. And anxiety when people (family, friends) would leave (to run errands) and would delay just a bit. I cried. Would panick. Now as an adult, anxiety prevents me from eating, and urges me to do things to myself that are not very nice. It prevents me from sleeping still, it makes my heart race and panick. Anxiety can kick im at any moment for me, alternating with depression. Im still having a hard time understand how that's possible.
Well, that's it for me, looking forward to read you all!