Discharge - TMI - contains photo of discharge.

Hi ladies,
I am exactly 6 weeks today according to my LMP. I just went to the loo to do a wee and when I wiped I noticed I had a tinged discharge on the toilet paper.
I have been having minor cramping pains on my left side today however I thought it was because I have been constipated and gasy for a couple of days.
Is this normal? Should I be concerned?