Success! Today I kept my cals under 800 and I walked 25,000 steps.
I went out to meet a friend around lunchtime- they used to have an ED and I don't want to trigger them at all, so I offered to pay for lunch for us both. Thank god for the menu having cals listed next to each item, I was able to order something low cal, but large enough for it to look like I was eating enough.
Hoping I can keep this up, I've got to go out to dinner tomorrow with some friends.