Anxious about sex

For a while now (18 months) I get anxious about sex. At the start I had a few times where i would go soft and climax super early (like 15/30 seconds) now when I even think about sex i get anxious or if my wife and I attempt sex I still finish quick.
I have tried the box breath , kegal , working out more etc (even the little blue pills) nothings working, my wife (and myself) are getting more and more frustrated. Any tips ?