Hey there! I've totally been there.
What has gotten me through these plateaus is not only increasing exercise, but changing it up. Since I run, I decided to add a hill. Lo and behold, I FINALLY lost some weight after a month!
So, maybe changing up your exercise routine? Adding a new exercise?
OK...That's weird...I SWEAR I just posted UNDER you!
Hmm...and I can't delete it and repost it..