What Causes Intermittent Pink Discharge And Abdominal Cramps After A Hysterectomy?

I had a hysterectomy about five weeks ago and every thing seemed fine I only had a little bit of pink discharge for about 4 day after wards and then it stopped then just a couple of days ago I started have cramps like I did when I was having my periods and am still having them I have also now noticed that I am starting to have the pink discharge again is this normal or should I go and have it checked out?