It happens. A few months ago I made a call with a small flush OTR, bigger pot than yours, 5h2h in the BB or smth like that, 3
on the board. The problem was that I narrowed his range to a flush or BS. I see two reds and instamuck. A few seconds later I realized that the K was a diamond and he decided to ridiculously overplay his two pair. Oh well. In my defense I had like an 11h jetlag at that time.