TMI post d&c

Vicki
Sorry all, this is TMI but I'm a little worried and not sure if this is normal or to call the docs?
I had a d&c 44 days ago, I bled quite heavily for 2 weeks after and then have had very slight brown discharge since. No cramps, itch or anything. 
Today iv been quite crampy and hoping AF is on its way but the last few times I've been to the loo I've noticed what looks like I'm passing tissue but no blood at all? I'm worried something isn't right :( does anyone have similar experience or know what this is? Thank you in advance!!