Re: Need help!!!
Welcome! I am so sorry you're experiencing this combination of problems. Let go of the guilt- PPD is serious, you deserve to feel better, and you cannot be blamed for taking the shot given the odds quoted to you by the doc. (FWIW, I think the doc seriously underestimated the likelihood of negative impacts to your supply, but that's another issue for another time.)
It can be difficult to separate low supply from normal supply based solely on how the baby acts. Babies often get fussy when their mom's supply goes down a bit, but lower supply isn't the same as low supply, IYKWIM. At this point, I would suggest feeding as much as possible and doing some very careful diaper counts. As long as the baby is wetting enough diapers, I would not supplement. Good diaper output = good milk input. Keep a record of poops, too- although any babies slow down their poop frequency to as little as one poop/week, if your baby continues to poop you know she's getting enough to eat. And, FTR, 1.5 oz via pump after nursing is very normal output for a nursing mom. That may seem surprising if you were getting more previously, but it really is fine.
Okay, on to increasing supply. Now might be a very good time to get rid of the Mirena. Many moms have little impact from Mirena, but some moms notice that Mirena makes a big dent in their supply. Since you can't do anything about the estrogen shot but wait until it wears off, you could at least take out the Mirena and see if that allows your supply to bounce back. I also think that if you have PPD, taking out the Mirena is probably a good idea: between 5 and 10% of women experience "depressed mood" as a side effect of Mirena (see the product insert here: http://www.mirena-us.com/safety/inde...9497&WT.srch=1).
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"