Please Help!

Has ANYONE else experienced diarrhea instead of throwing up? (Sorry, TMI here) My diarrhea started in my week 5, but it was pretty normal and bearable. It was the accompanied by constipation, then dairrhea, and back-and-forth until about middle of week 6. Then it was more consistent diarrhea, and has just continued to get worse. It is now green (I'm 8 weeks today). Some websites say diarrhea instead of throwing up is normal, then some say diarrhea lasting more than 24 hours is never normal. I just feel so sick in general, weak stomach, no appetite. If anyone else has experienced anything like this I'd love to know I'm not the only one.
Today I'm finally considering going to a doctor, my first appointment with my OB is next week.