Hi B.,
Congratulations and good luck, I know this is a scary time. I too had a C section, and I also got a little electric Madela pump, but didn't really use it much past the first few weeks to reduce leakage or pressure because I too was a milk making machine. Also the plastic bottle thing is absolutely true as well. When plastic is heated it releases chemicals like PCB's into the liquid contained in them. I went on ebay and found glass baby bottles, in fact I still have some and you are welcome to them as my daughter is now using a cup. Just email me if you are interested and I can mail them to you. I did use the little medela bags and put them in the freezer right away and dated them. Then I would just thaw them in the fridge, pour the milk into a glass bottle and reheat it in a pan of hot water. As for leakage, I didn't like the little paperlike pads so I bought a package of cloth diapers and sewed circles into them and cut them out into little round pads. They were reusable that way and the cotton felt much better on my sore nipples than those pads you buy at the store. Prefolded Cloth diapers were indispensable! I used them for burp pads, changing pads, milk pads over my chest when I napped, they were great. and they are all cotton and reusable, which I liked. They are so absorbant and get softer with use.
Also those waterproof pads were a must. I got them at Fred Meyer in the bedding section. They are a large square, about 3x2 feet, and they helped keep my bed from always smelling like milk. I got 3 or 4 of them and then you just wash them. I am not a fan of bleach so I use vinegar and baking soda to control odors in laundry. They were great for putting in my daughter's bed later during potty training.
For sore nipples, the best thing I found was sunlight and a cool washcloth. The creams and salves they gave me didn't really work, and they I had to wipe a sore nipple to remove it before I could nurse because I didn't want my baby ingesting them.
One thing I wish I had known before having a C section was ice packs are a must! I am not a fan being on any medication, but they of course gave me lots of pain medication and prescriptions after the surgery. But what I found that work 100 times better was those soft ice packs. I discovered that the reason I was getting pain at the incision site was from swelling and inflammation, both of which were controlled much better with a constant ice pack, than with any medication they gave me. And that way my baby wasn't getting a bunch of pain medication for weeks after the surgery while I was recovering. Ice packs ice packs ice packs! You will love them. Another thing is take your own water bottle to the hospital. They gave me this gross water bottle that tasted like plastic after just a little while and I know what feeding me plenty of chemicals from the plastic. If I had it to do again, I would take my own glass water bottle, ( a sobe bottle is what I use) and a bigger glass bottle to store water in. We drink a lot of water so I found a glass milk jug in cost cutter from twin B. creamery, and rewashed the bottle and used it for storing drinking water. We bought water from the store from those filtering dispensers in those water jugs then transferred it to the glass jugs at home. We now have a reverse osmosis filtering system under our sink.
Also a nice nursing bra is a must. Shot around and find 3 or 4 that you find comfortable and easy to use. Some women like the boppy, but I used it mostly during the time she was learning to sit up. I would sit her in the middle of it and play with her lol.
I wish you all the best with the upcoming surgery, both you and your son.