Can Unisom/B6 combo cause diarrhea?

Grnmolly
So I started having terrible nausea with vomiting at 6 weeks. Did not have any MS with my 1st pregnancy and barely any with my 2nd so this is a shock. Anyway, I started on the 100 mg B6 with 1/2 tab unisom twice daily OTC regimen. My nausea is a little less but now I have watery diarrhea everyday. Could this be from the meds? Just wondering if anyone else has experienced it. Doesn't seem like a common side effect from reviewing online. TIA!