Is There Any Reason To Suspect A Link Between My

Is there any reason to suspect a link between my constant nausea/vomiting and my menstrual cycle? It tends to start happening a day or two before my period. I've been trying to deal with this and figure it out with a Gastroenterologist over the last year and was also diagnosed with excessive GERD and Barret's esophagus, but I'm still having this nausea and vomitting every few months, right before my period. The nausea and vomiting can also last from anywhere between 5-14 days. My periods are only 2 days long, at the most 3, and 50% of the time I bleed after intercourse without any pain after or during. It's been about 4 years since my last "squeeky clean" gynecological exam.