Maybe it would help to reframe this as the fact that you are just being sensitive and interrogating what it is like to be alive and have a gender? i think that's something we all do to some degree. I'm constantly amazed and surprised when people react to me a certain way for being a woman, whether it's bad or good. It is often on the back of my mind "wow how much of this experience would be different for a man?". But I love being a woman, because that's who I am, it's part of my past, my experiences, it allows me to compare and contrast what life is like for my male "brothers". I hope that you can get past feeling bad, as others have said, the unworthiness part sounds like a bit of an intrusive thought.