I got mine in Jan of this year, but since I'm nursing I didn't get my first period until 3 months ago. They are WAY heavier than normal and I soak through super maxi pads with tampons at the same time in a couple of hours. The first months I freaked out, but I've been reassured it just takes abouy 6 months to normalize.

I don't get cramping on the bike though. I do feel different - I can't really pinpoint what. I think I notice being drier some weeks and wetter some weeks when I'm on the bike. No agony here though.

Is it possible you have an infection of some sort?