Thanks for writing in.
You have guessed it right. You should stop taking this medication, as you are experiencing sudden vision disturbances along with severe headache
Exact cause for migraine
and visual problems not known but one of the reason is tendency of medicine to cause thrombo-embolic phenomenon. This means tendency of blood clot formation in body increases.
So consult your treating gynecologist for same and tell the need to stop medication. So alternate way of treating heavy periods
can be found out.
I hope I have answered your query. In case of any doubt, please revert back.