Hi K.,
I can only imagine what this is going to be like!! I wish you all the luck in the world. I have 4. Ages 18, 16, 8, and 2 1/2, and I have nursed them all (14 months, 10 months, 18 months, and 15 months consecutively.)
With my first, I didn't use a pacifier, and regretted it. She nursed constantly and vomited often!! With my second, I learned and she had a paci by 2 days old (she stayed in the hospital without me for jaundice). My third also took the paci, and nursed on a regular schedule. My last didn't want anything to do with the paci, and still nursed on a regular schedule. Amazing how that worked out!!
I would definitely expect your body to make much more milk than your used to! You should be able to do this with minimal complications. I can see that you want to do this, and that alone will make it easier!
I'm sure you already know about schedules, you will just have another mouth to include into your schedule. I can only suggest you alternate often with who eats first and feed them right after another, if not, you will be nursing someone every hour to 1 1/2 hours. and hope they dont get hungry at the same time. If they do, keep the other, if awake, close to you so you can talk and soothe him/her while feeding the other. or use a paci to hold off a feeding for a couple minutes. If you get too overwhelmed, do not feel badly for thinking about a formula/bottle suppliment. with 2, it may be needed once in a while.
If you do happen to need to use a paci or a bottle occassionally: Make sure you use a NUK nipple for both. They are the only nipples that are shaped more like the real thing and will eliminate confusion and latching problems.(sorry, not the only one, I do think I remember another brand, maybe Gerber who makes a similar nipple) NUK pacis are somewhat simple to find, and are age orientated. The bottle nipples are a little more harder to find, most hospitals dont carry them anymore and dont know what your talking about when you ask for them, I have tried with my last 2. I found the last ones I used at Weis Market and are also marked by age or maybe try websites. www.NUK.com, I just checked it out, should help you alot should you ever need the extra feeding/soothing help.
Gerber.com, in products, has a gerber nuk orthodontic pacifier listed.
Good Luck!!
You can do this, do not be discouraged!!!