Also remember- you have to adjust your diet as you lose weight. If you weigh more, you can consume more and lose weight. Then when you weigh less, you have to re-evaluate and eat less/exercise more.
I hit that wall a few times this over this weight-loss adventure this year. My advice is- if it isn't working you need to change it up. The first time my boyfriend tried to explain that to me, I got frustrated and threw a tantrum I felt like, I WAS trying and it STILL WASN'T GOOD ENOUGH. Oh man, I remember how pissed I was.
But then I sucked it up and changed my exercise routine and got back on the weight-loss track.
Now I change it up whenever my weight-loss slows down. Strength training really made a difference for me. So did being really, really honest with the calorie counter. It's so easy to lie to yourself... Not saying you do, but I certainly did
One more thing: take the calories burned during exercise with a grain of salt. It is very difficult to know exactly how many calories you are burning. You need to work out with intensity. Make it your goal to sweat like a pig and get out of breath. If you aren't sweating, you can work harder.
Just keep going and try not to get too frustrated You can do it!