My son is a little over 3 weeks old, and I've been breastfeeding from day one. At his 2 week mark, we had a Drs appointment to keep an eye on his weight, to make sure he was gaining weight. When he was born, he was 8lbs 15.4ozs. At his 2 week weigh in, he was only 8lbs 9ozs. So, my Dr suggested I go to a breastfeeding support group to have him weighed, and get any questions I had answered. At the 3 week mark, it was the second day of the support group, and he had LOST weight. I was breastfeeding like a maniac and this was disappointing for me. So, the nurse suggested I breastfeed and supplement with formula right after, just to get the weight gain jump started. She also suggested I pump 3 times a day for 3 days to help get my supply up. Well, I've been pumping, but I'm still only getting 1oz from the right side, and less than half an oz from the left, and I am so frustrated. I don't think it's my pump, because at less than half strength it can get the milk flowing well. I'm also worried about my left nipple. Both nipples get dark purple/black when I pump, but the left nipple gets extremely dry and BLACK almost instantly, and I have to keep moving the strength up in order to get ANY milk from it. And the pain is pretty bad. I can only pump that side for about 5-10 minutes before the milk stops flowing and the pain gets bad. Any reason for this? I am planning to take my pump to the next support group day on Monday, but I was hoping some of you might also have some insight to the cause. Perhaps some of you have had these problems? I'm just so frustrated because I'm trying to do what's best for my baby, since I was unable to breastfeed my first son, and I'm getting all of these setbacks. P.S. Sorry this is so long!