over the years on these boards regarding nausea and stomach upset from Estinyl (ethinyl estradiol). So it could definitely be the cause for you. I get migraines and nausea from it, so I've only been able to try it a few times before having to stop it. Dr. Check gave me a prescription for a vaginal suppository to see if that would help avoid the symptoms, but I chickened out at the time and didn't want to try it again. If the side effects become too much, that might be an option for you to try.