One day heavy AF, then nothing?!?!

AF started on Monday, just as glow predicted. It was very heavy and I was cramping quite a bit. The cramping is normal but usually I spot the first day then it comes on full force the second and third days, and begins to taper off. Anyway. It was full force, very heavy for Monday. Then yesterday (day 2)and today I've had NOTHING! Anybody have any idea what the heck that's all about? I did start my first round of clomid last cycle. Maybe that has something to do with it.