My mother is falling down in unconscious manner. 1stly she is feeling black dizziness. Thn she is falling down in ground (Senseless). It happened 2 times suddenly.  Suiting,chest pain are not happening at that time. She is feeling like something is pinning in her left side foot and left hand is paining from her palm to elbow since 1 month. We have test ECG but it's normal. Pls suggest what's happening and what to do 🙏