Hi, I am 44 and had a c section 4 years ago my tummy tends to blow up since and can be painful. Last year I had a blood test as I thought that I was peri because my periods have become very light & lasting 2 days opposed to 5 the results were negative for peri. However my periods are still regular but this month the blood is very dark almost black and I find this very worrying. Any advice greatly appreciated I am going to make a Dr's appt next week