I understand the thing about the pneumonia. My 5 year old (who was 4 weeks early, like my current baby) got severe pneumonia when he was 5 weeks old-and I lived at the hospital for a full week, and ended up doing steroids and nebulizer treatments on him for a couple of months before he was 100% again. (It was a REALLY close call-with his lungs over half full of fluid...) I had to pump and dump for that week in the NICU, but ended up having to supplement anyhow for the rest of the time that I nursed. My supply (due to the STRESS, not the pumping or lack of) just diminished. It was almost as if mother nature, because of the baby not stimulating me, and my stress level, "thought" the worst had happened. Just like how I can let down milk everywhere if Saber cries halfway through the house-no stimulation at all.
I ended up not nursing Raiden (my 5 year old) for the entire year, simply because it was too much to deal with the breastfeeding AND supplementing with formula. I needed to have everything for BOTH feedings...and it was stressful to pack all of the nursing pads/cover/lanolin AND the formula items as well. (I leak/let down at the drop of a hat...and I have issues with soreness-so NOT bringing nursing supplies in the diaper bag isn't an option.)
I am currently having nursing issues as well with Saber. I spent the entire first month battling the nipple soreness, and he is now 7 weeks old. That has improved-but Saber is SOOOOO very cranky and colicky acting. I have thought that he was just extremely "needy" compared to my others...but I am beginning to wonder otherwise. I am pretty sure that he has some food sensitivities, and is getting cranky/gassy/irritable from something in my milk. It is like the light bulb went off as I started to think about the way that he has been acting. His pediatrician noticed he was very gassy at his 1 month checkup...there have been a couple occasions where he has suddenly gotten a little "wheezy" sounding for a few hours (not severe...I just notice it, no one else does...), there have been a few instances over the past 7 weeks where he has gotten what looks like baby acne/milk bumps that come and go suddenly...and he has pulled away from me while getting upset during feedings now and then. That, combined with the general colickyness and the NO SLEEPING (which has not improved ONE BIT since birth) I am beginning to suspect my diet as the cause. He has even been spitting up more than my other two babies did.
So...now I am trying to fuigure out the cause(s) and what to do. If it is something simple to cut out like chocolate, or broccoli, nuts, eggs, or what have you...then fine-but I actually suspect that it might be dairy...which I am currently cutting out for a week now to check. If it IS dairy...I don't know how long I can continue to nurse...because dairy is in freaking EVERYTHING.

It seems so obvious to cut out milk/yogurt/cheese...but half of the protein bars contain whey...I would pretty much have to eat nothing but lean meat, fruit, veggies, and oatmeal. It might even be more than one food, I don't know. I DO know that I am extremely tired of having a baby who fusses and cries every waking minute-and who is awake MOST of the time-he won't even sleep/nap through the day like most little babies-which makes him even fussier. Added up, I bet he only sleeps/naps/dozes altogether about 7-8 hours a day, and this includes the 10 minute doze in the car, etc.
I told my DH that is Saber would have been first, we would have had 1 child, not three.
I just get really upset when there are nursing mothers around me who have this beautiful, utopian experience with it-like a friend of mine-and all I have is trouble-all three times.

I know it is awful to admit-but I was so much less "stressed" when I went to formula after battling nursing for the first few months with the other two. It's like breastfeeding feels more like a "quest" rather than a good, loving experience.
Sorry to rant...I just have been going on about 2-3 hours of sleep total per day and dealing with a cranky baby plus my other two (meaning I can't nap during the day-I have to take care of them.) for almost 2 months. I have no family around, or a babysitter I trust, to give me a little break.