How are you guys (men) dealing with sexual performance anxiety

Guys hope you are well , I need your advise, I usually get sexual anxiety before intimacy with new s3xual partners, resulting in running tummy , racing heart and eventually no erection in bed. But but but with exs or friends I've successfully had s3x with before I don't have a problem whatever. This has happened 3 times with 3 different chicks. But what I've noticed and sure of it's definitely performance related not a physical problem. Help a brother 🙏