Feeling Down

I am currently 48.4 pounds down since February. I have been using a semaglutide and doing keto. It has been an amazing journey but this week I have had one of the worst moments of constipation. I am at the point now where I want to take a break and let my system reset. It is SO hard to stay on top of fiber when I barely have an appetite. Anyone use any supplements that helped tremendously?