Sure thing... go to a health food store or a vitamin store (even some grocery stores carry some, but talking with someone at a health store will give you better info)... you can get herbs in raw form, liquid, tablet, gels, etc.
Also, I would suggest you think about a transvaginal ultrasound... it isn't a terrible thing at all, and gives lots of information!
Now, work on a plan to limit your stress. Write things down ..organize... it pays off to take the time now. Are you talking about school exams?

TC