You are not alone. I'm 3 years out and have gained 50 pounds.. ugh I hate just even typing that out!
The best advice I have read is that we still have our tools, so we need to take advantage of that.
I've been back on track these last 3 days, I went back to the foods I ate when I was losing (chicken, tuna, cottage cheese, greek yogurt, cheese, low carb veggies) I've been eating Protein first, then LC veggies and it seems to be really helping alot!
I've also been drinking a ton of Water and brewed green tea, I never cared for it much before but now I love it.
Good thing you're doing something about it now before it became more. Wishing you the best of luck, you can do this!