i had this in the middle of my 1st trimester, dr told me to eat small snacks through the day even if i wasn't hungry. it eventually wenr away, good luck hope you feel better
i would ring your midwife, my blood pressure has been slightly high for a few weeks and i was told to ring her if i experienced any blurry vision or headaches
I experienced this for the first time only 3 days ago it started as just a headache then the blurry vision started which made me concerned so I went into hospital to get it checked out. Turned out it was only a migraine however I did not know this as I have never had one before. I was sent home after 2 hours and told to rest in a dark room if it happens again. If I was you I would still get it checked out as headaches during pregnancy could be something serious such as high blood pressure etc.