Bi at 43?

Hi there, 

I really need to get this off my chest. I'm a happily married man. Two years ago I participated in a plant medicine ceremony after which I sort of got a crush on another guy who also participated in the ceremony. That was really confusing as I had always consider myself to be straight. However, I feel that as I connect stronger to myself my sexual orientation becomes more fluid. Because my attraction to women is always there and my attraction to men sometimes completely disappears I'm confused. Could it be that I turned out to be bi only at the age of 43 or am fooling myself into believing i'm something I'm not.