Can stress cause lack of weight loss.....

I have been on a diet regimen and not experincing the same amount of weight loss as I have done before.Not to forget that I am under a tremendous amount of stress.My cycle normally last a week, it lasted for two days stopped and started again( some days later) and then stopped,and started and then I had a slimy brownish color dishcharge.I am also retainig a lot of water.Could all of this be stress related?