I am so sorry that you are struggling, but you are exactly right that you have to keep trying. The only way we can fail is to give up. If I give up, I gain weight back so rapidly. Even with when struggling, trying helps keep us from large amounts of weight gain.
I am struggling too, ever since the holidays, so I do know how hard this is. However, I know that I have been in the grove before and I will get back there again. So will you. Just keep working at it.
You are planning for a good day. Just keep taking it one day at a time. I know that you can do this.