Hi, I have a 4 1/2 month old baby boy. I've continued spotting/light bleeding on and off ever since the heavy flow of pp bleeding stopped (since about 4 weeks). It mostly happens when I workout hard, but occasionally happens just out of the blue. Anyone have any idea why? I am excusively breastfeeding. Another thing is that I have gained 17lbs since he was 4 weeks old, and have also been working out since then. I have also had occasional stomach bloating (last night I looked like I was six monthes pregnant). I went to my midwife at 11 weeks pp and she tested my thyroid, said it was on the low end of normal and to be retested when I'm done bf'ing. Should I be calling her back, any one have any idea what's wrong with me?