Hello You are having dizziness, nausea, stomach cramps ( like during menses), headache . Your age is 38 years . After going through your query ,these symptoms may be due to these reasons, these includes. 1 Hormonal changes as age advance estrogen secretion diminishes and it causes so many symptoms as you mentioned in your query . Diagnosis can be confirmed by blood examination for estrogen level . 2 Hyper acidity is another such cause . Try raising the head of your bed about 4 inches with blocks. It also might help to avoid drinking or eating for 2 hours before you lie down. To help control stomach acid ( hyper acidity ) one should not drink alcohol or drinks with caffeine in them , eat chocolates or spicy or greasy foods. Take some antacid . 3 Tension is another such cause which produces such symptoms , so if tension present , relax . I recommend you please wait for some times or consult a primary care physician and get his opinion as mentioned above.