I Have A Very Active And Fufilling Sex Life And

i have a very active and fufilling sex life and for most of my life I have been able to maintain an erection for long periods of time, even after having an orgasm multiple times . this ability has lessened in the last year or so and in the last month or so I have at times struggled to get and keep an erection. it has escalated quickly to where in the last 24 hours i can barely get hard at all. I am very concerned