Hi, I had gone through your question and understand your concerns. In my opinion you were experiencing a faint like episode which is basically a lower extremities venous incontinence which cause decreased cerebral perfusion pressure (which is less blood in your head). Make sure you get enough liquids, if you are hypertensive under treatment you should check the therapy with your cardiologist and at last if this happens again you should do a Doppler Ultrasound of your lower extremities. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.