Uncommon?

Terra
With my first pregnancy (lost him/her at 10 weeks) i was nauseated constantly from week 6 to 8. This one, I'm 4w5d, I've had diarrhea for 3 days. What gives? Anyone else have this happen? No weird foods and i don't feel sick. Pregnancy is just insane! I'm keeping ahead of dehydration so I'm not worried, just curious what everyone else is feeling. :)