Is this normal???

Sam
So for the last few weeks I have had extreme mood swings but mainly excessive anger. I have a very high stress level as well because of a lot of things going on right now..several people have told me that I will have a miscarriage if I don't relax, I'm almost 8 weeks. Do you really have a miscarriage from high levels of stress and bad mood swings?? Also any suggestions on ways to relax and handle the crazy??!