Welcome back =)
You're not the first person to gain some weight back, and you won't be the last. Good news is that you've caught it, you know you want to change it around, and you absolutely have it within you to do so.
You don't necessarily need to start right back up at where you were. You can make a few changes to get back into the swing of eating healthier and moving more. Or head back to a WW meeting and let things sink back in. Choose a specific goal (doesn't have to be a weight goal), plan out how to make that happen. Then start with the first step
You can do it!