Pregnancy TMI

This is kind of embarrassing and I can't believe I'm asking, just Wana know if I'm alone. Going on almost 15 weeks, I've had no morning sickness, no real pain. Everything is pretty much smooth sailing. For the past 2 days, when I go to the bathroom (#2) it's been more like diarrhea. No stomach ache, no nausea, nothing. Just the feeling of having to go. Has anyone else experienced this? Am I over reacting?