2 months ago I fell unconscious shortly after finishing a meal. I was unconscious long enough for first responders to be there and the ambulance not long after. The waitress said I was looking ashen before I went unconscious and I vomited as I was falling. I felt no warning signs before this. All cardiac, brain, blood work, and blood pressure checks came back in normal to excellent range. I am a 55 year old female, a little overweight, but active. My doctor has basically said, come back if it happens again, but I do not want it to happen again. Is there something else I can be checking to find a cause? Thank you.