Give it a try, hun, if you want to, but give it a good try - not 3 nights, but a week or two weeks, it's the only way to tell. BTW, it should be at a time that's easy for you, before you go to bed, not you waking up to do it, iyswim.
And don't worry if she seems to wake up a bit, she'll either go back to sleep while feeding or immediately after. Treat it like a NF, very low lighting, very quiet, and all that. I would be pretty sure it'll shift that 12.30 waking.