A day ago in the evening, I had a sudden severe hypotension and fluttering in my chest, more like I was frightened and daydreaming, I started feeling dizzy and nauseous then my breathing became too shallow, some minutes later I had a difficulty breathing and felt like fainting. It somehow felt like I was dying, I went from my room to downstairs to seek the help of my family members, I took a pill of vitamin C along with orange juice, meantime my hands and feet became paralyzed and numb, I couldn't breathe properly, my face went pale, my tongue felt too heavy, everything around me started to spin, my breathing got worse and my chest started a weird tingling and numbness. My brother took me to the emergency service and they put me into oxygen, it took me 1h30 for my breathing to be "comfortable" again. Next morning, (which is yesterday morning) my chest went back to normal but my heartbeat was racing and every minimal effort made me exhausted.
Could you please give me some insight on what my symptoms could be, knowing I suffer from mild asthma and I never had an asthma attack?