I have been nauseous on and off for about 2 weeks. I am nauseous one day then a few days later I get nauseous and then have terrible diarrhea for about an hour or so then it all goes away. A day goes by then it all starts again. The diarrhea tends to come between 3pm and 6pm. The nausea varies -sometimes it starts when I wake up and lasts a few hours and other times it starts around 2pm and lasts for a few hours. I have poly cystic ovary syndrome and am on metformin to help regulate me. I am on a low carb diet as well to help with the PCOS. I am currently 4 days late but the pregnancy test is negative.

Can anyone help me figure out what's going on?

Thanks