I think you did well, Mai, to limit it to 300 and balance your calories. You didn't take any backward steps today; sometimes that's the best you can do.
I understand about it being your rest day. Today was my rest day, too, and I burned about 1550 calories. It's pretty hard to get a significant deficit from that, so it takes longer to get rid of a pound.
Keep it up; you're doing great!
And now that you don't have to be perfect, you can be good.