Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, you should immediately
consult doctor and get done
1. Blood pressure monitoring
2. Ecg
3. MRI brain.
Uncontrolled hypertension,
hypotension, heart diseases and brainstorming diseases can cause these sudden symptoms of headache,
dizziness and passing out feelings.
All these are medical emergencies and should be treated promptly if present. So first rule out all these possibilities.
If all these are normal then sometimes stress and
anxiety can also cause similar symptoms.
So avoid stress and tension, be relax and calm.
But first consult doctor and get yourself checked.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.