Did you take your blood pressure? If it is normal, then you can probably safely lift unless it causes too much pain. If your blood pressure is high, don't lift and see your doc. From your avatar I assume you are not on any gear? If you are, get on an aromatase inhibitor and get those estrogen levels down. If you are natural and having this problem then you need to get it figured out. While you wait to see your doc, keep you feet elevated at night and try to sleep on your left side.
Hope this helps.