Hello Tina!
I agree with changing things up, adding different exercises, trying a new class.
If you count calories, calorie cycling or zig-zagging can do wonders to speed up weight loss. It fools the body into thinking it actually can lose weight rather than hold onto the precious fat for times of famine.
Sometimes eating "clean" can help ie plenty of fresh fruits and veggies, less bread and crackers, more whole grains (brown/wild rice, oats, quinoa, millet, etc). Make sure you're getting enough GOOD fats from nuts, avocados, olive oil, flax oil etc, good fats can speed up weight loss too.
Also, writing EVERYTHING you do down, and looking back at it, checking, reassessing adjusting things that don't work.
Good luck!