Congratulations! I remember that feeling of being overwhelmed when we first found out we were having twins. I posted about it like crazy here. And next month they'll be 5yo. We all survived! And you will too.
I haven't read all the other responses so I'm not sure if these have been said. But if you plan to breast feed, I HIGHLY suggest a twin-sizes bfing pillow and nursing them tandomly. If not, you will spend all your time either nursing, burping, & diapering. Instead, if one gets hungry, offer the breast to both. It will save you some time.
I also want to suggest you get a double snap and go. They really do make life easier for the first few months.
I think the best advice I received was to lower my expectations for the first 6 months and accept all offers of help. Let well-meaning friends organize meals for you, fold a load of laundry, pick up some groceries for you, change some sheets, or babysit the twins while you get in a hour nap. And go easy on yourself. Eat off paper plates, order take-out a lot, have your DH take your laundry to a service that will wash and fold. The first 6 months are exhausting. Go easy on yourself.
As for your pregnancy, I remember well a mom here offering some excellent advice. Drink an obscene amount of water. Your main goal now is to drink water and rest as much as possible to keep those babies in utero for as long as possible. The longer they stay in there, the healthier they will be.
you sound like you are on the right track. You can do this.
" I object to violence because when it appears to do good, the good is only temporary; the evil it does is permanent." Mahatma Gandhi
"This is the ultimate weakness of violence: It multiplies evil and violence in the universe. It doesn't solve any problems." Martin Luther King, Jr.