Yes! That was a sign for me that I was pregnant to begin with lol I've never had dirrehea and all of a sudden I got it, and in My first trimester I got dirrehea at least a couple times.. for me that was my morning sickness haha
I had the flu twice and a bad cold already. I'm almost 22 weeks and my baby is fine. Had the gender ultrasound at 20 weeks and baby is perfect.
You should be fine. The only concern really is dehydration so make sure your drinking extra fluids. Take care