CeCe,
I am so sorry for your loss. I had really long cycles after my d&c and only now 6 months later has it gone back to normal so the last two cycles have been what they were prior to being pregnant. My first cycle was like 6 weeks long! the second was about 48 days then the third was 37 and now finally 34! If you are concerned though talk to your dr. I had blood tests done to see if I had ovualted and had all my levels checked regulary as I felt I was going crazy not knowing what my body was doing but as my ob said some womens bodies just take a little longer then others to get back on track!
I hope all works out soon
take care