Hi! I haven't been on the forum for a few days, so missed your post til now. How is it going? Do you feel better about your doe? It is normal for her udder to be very large at this point. If it worries you too much, go ahead and milk her some to relieve the pressure. A couple of cups from each side should be plenty and won't effect the amount of milk she's producing. It is also normal for her to be "off her feed" for a while after giving birth. Don't worry, she will get back to normal soon. Then she will want even more than normal so she can keep up with the demand.
At this point, the milk will still contain colostrum. We usually don't drink our milk until the kids are two weeks old. I know some people drink the milk after just one week, but we think it still tastes bad at that point, so wait the two. If you have other animals, they would like the milk, or you can use it for cooking until it tastes better to you.
Alpines are very good milkers, so she might be producing too much for the kids, especially if she has kidded before. If you are planning on continuing to milk her (for you) you should consider separating the kids at night at the two week mark, so you can milk first thing in the morning, then let the kids run with her during the day. That way her production won't drop too much and you'll still have a lot for you.
Don't worry, she'll (and you'll) be fine!