First, do you track all of your calories (every bite) and if so, are you eating all of your points? If not, you're probably not eating enough and your body is in "starvation" mode and won't let go of the weight because of it. A lot of people who are desperate to lose weight automatically think less calories means they will lose weight faster. If you're WW recommended calories per day is 1600, you should be eating very close to 1600 calories per day. And if you are exercising as much as you say, you should probably eat most, if not all, of your activity points too. If you're doing weight training, remember you are replacing fat with muscle which weighs more, but you might be able to tell that your clothes are fitting looser if that's what's happening.
On the other hand, if you don't track all of your calories, you could be going over your recommended points which is sabotaging your workout efforts.
I've always heard if you hit a plateau, the best way to get out of it is change your food routine. Mix it up. Instead of eating at the low side of your points range, eat on the high side of your range, or vice versa. Or even alternate. Two days on the low side, two days on the high side.
Maybe give those things a try and see if you don't see a loss next week.
Good luck!