Ok I Woke Up Feeling Dizzy & Slightly Nauseous &

Ok I woke up feeling dizzy & slightly nauseous & it continued throughout the day. No similar symptoms ever, except when I had flu or was pregnant. Neither are a possibility now, no fever or other symptoms and I'm a 63 year old female way past menopause. Also only known related condition is HBP controlled with meds, and had my annual physical about 2 weeks ago with nothing notable. Any suggestions?