Possible miscarriage?

I'm freaking out just a little bit. This post may be TMI but pregnancy isn't pretty business. I've been having some "loose stool" for the past 5 days and I really didn't think it was that big of deal (honestly I thought I dodged the constipation bullet that everyone seems to complain about) and even my pregnancy book says that it's normal....but then I read if it was "severe" (as in 3 times a day or more) to call the doctor. So then I realized it's severe....but not that I'm having cramping or anything it's just more annoying - especially with my hour long commute (don't worry, no accidents yet....and I don't mean car accidents). So I just got off the phone with my doctors office and she said the midwife would call me back - but she started asking me all these questions about if I had bleeding or cramping. So then I started freaking out because then I realized she thinks I could be having a miscarriage! I'm so close to the end of my first trimester and I feel fine otherwise so I'm trying not to worry....but I am. :(