Had DS 6ish weeks ago. Normal lochia pattern as far as I can tell, bright red at the start, going to pinky red and then the white lochia stuff by the end of the first week. Stopped wearing any kind of pads by week 3.
Now I've started getting bright red bleeding again at the start of week 6. I'm EBF so hadn't expected periods to start up so soon but I am getting paracetamol-worthy crampy pains and needing to use pads again. Argh! Feel rubbish, grumpy and hormonal but no sore boobs like I usually get. Managed to soak through pants and pyjamas one morning when I wasn't expecting to be bleeding. 
Am I unlucky with periods restarting early do you think or should I be worried and talking to my GP at six week check on Friday in case of retained membranes or something?