I went ahead and increased the Dom. I'm now taking 20mg 4 times/day. There will come a time when I'm out and won't be able to get a prescription for more, but I'll cross that bride when I come to it.
I think increasing really did the trick, though! I now get about 5ml/pump total. Not a lot yet, but it's milk! Also, it's been increasing really fast (doubling every day or so), so I'm very happy. I wish there was a way to know when I'd start getting real amounts though! I'm so impatient!