This sounds like what happened to me. Had D & C on 20/06/09, then 28 days later, cramping, bleeding for a couple of hours then clear mucus discharge for a couple of days afterwards.
I thought this was my period. Then 20 days later I got my heavy period which lasted 5 days. So thought all was back to normal with my cycle.
Started using Ovulation tests to see when we should bed again to ttc, and I'm now on day 20 with no real positive yet.
So if the first time I blead was my ovulation, I should be expecting to ovulate sometime in the next two weeks. But my cycles used to be 28 days exactly, now they are all over the place...
Hope all works out for you and me...