I am having low supply in one breast at only 2.5 weeks postpartum. It started 4 days ago. I try to pump to stimulate and also start feedings on the affected side, but so far no luck in getting supply back up. Usually I can only get a few drops from the affected side and little one fusses or falls asleep after a few minutes on that side. Other side seems to be producing well. Is it true that hyperthyroidism can affect milk supply? I am on PTU which is safe for little ones according to my endocrinologist...was on it during pregnancy too. This is my fourth child. First child, no trouble...second had latch-on problems...third child had low milk supply issues... and now this trouble with #4. Any advice?