Help! Bdsm lovers out there...

Today my boyfriend and I had our first really bdsm type sex in which I was handcuffed and struck with a flogger, choked and had my hair pulled really hard. It was completely consensual, and I enjoyed it in the moment but as soon as it ended I felt an overwhelming flood of emotion and started crying. Is this normal, has it happened to anyone else? How do you deal with it? Does it go away in time? Any tips would be appreciated!