One thing that sometimes helps me with any plateau is to vary my eating over the course of several days. Like eat less calories one day and more the next then in between. Our bodies adjust quickly and sometimes our metabolism slows in response.
Speaking of which, the less you weigh the slower your metabolism which makes those last pounds hard!
You can also try varying your workouts. Again, our bodies adjust.
I get it - I am pretty petite and 5 pounds is a full size on me. But you also need to find where your body is comfortable to maintain. As a yo-yo dieter, I think that in the past I have struggled because I wanted to be just a bit thinner and if I'd been happy where I was I might have maintained easily instead of gaining back