Hi Cassandra - there's a bit of a string of conversation under the heading 'First Time Posting', which I've just found. Lots of people feeling positive about the future while acknowledging that it ain't easy. I bet 99% of the people on this site have tried at least once before.
Congratulations on losing all that weight last year. Shows you can do it again. Now you know what might happen (again, I bet most people have had that experience) you can plan to keep it off this time.
Tomorrow is another day. And it might be even better.