Period trying to come back?

[xxchezxx]

My son is 5 months old and is ebf. Since he was born I have had what I assumed to be 3 periods at 8, 12, & 16 weeks pp. Last Tuesday, I noticed very light pink discharge when I went to the bathroom and thought I was starting again, timing fits for 20 weeks pp, however, its been 9 days now and I have still only had this very light pinkish discharge, not all the time, doesn't go on a pad at all, just when I wipe, (sorry for tmi). Should I go to to the Dr as it has been over a week? Or is it just my body getting back to normal? I had a smear 18/19 weeks pp, results came back clear. Any advice at all would be helpful. Thank you Ladies.