Its started again

Prior to xmas break I had erection and early climax issues for approx 1 year, wife and I went on a 4 week trip away from work and other distractions. I became a self proclaimed sex guru. We were doing it 3-4 times a day , delaying ejaculation when ever I wanted. Fast forward to February , and it’s returned, unable to get fully erect and climaxing wag to quick. I can’t spend my life on holiday . What is the best way to relax and get stress free ( even If I don’t feel stressed).