Sounds similar to my hypoglycemia symptoms I get at times. You need to eat a well balanced diet and cut out all refined sugars, concentrate more on organic veggies, fruits, etc Avoid all alcohol as well.. Also, you could have weak adrenal glands, this, too, can cause the problems you are having. The doc can order some tests to determine if this is the case or not.
I would recommend having your blood sugar and blood pressure checked. I would not recommend drinking alcohol if that is possible.
What's your diet like?
i think bcoz of the low blood pressure ,you need to take a good healthy food and drink lots of water too.