I would never think that about a trans woman and I hope no one ever makes you feel like that!
Haha, the insecurity is there no matter what. The feeling of not being good enough comes from the inside. It's super easy for me to go to an assumption spree regarding what others think about me. And my understanding is that this is fairly universal among all trans folks.
But also: If I get a good hug and feel cared, I'm bound to forget to worry.