B.C.
Losing weight just gets harder to do as we get older.
What was effortless at 22 took a whole lot more effort at 32, and at 52 it doesn't seem like all the effort in the world is going to make my weight budge - but I keep trying anyway.
It might be the hormones (with or without the shot) but maybe not.
You just have to find a new 'normal' for you.
In the mean time, keep doing what you're doing, drink a lot of water and walk and go up and down stairs a lot.