Anxiety do be a bitch like that, but in the end it's just intrusive thoughts. You're gonna have to disregard them, and have confidence that the choice you're making is a correct one. Also I understand that's a lot easier said than done, but from my own experience it's really the best advice I got, and I can say anxiety's done a lot more harm than good in my own life. Maybe it don't mean shit coming from a stranger, but I believe you can do it.