TMI diarrhea, morning sickness?!

Ok ladies I need some advice!! I have had diarrhea I’m the mornings about two or three times but only once since I found out I’m pregnant. It’s only in the mornings and not every morning. Can this be a form of morning sickness? I’ll be 5 weeks on Wednesday. I’ve also been cramping a lot in the lower back, no bleeding just mild cramps.