Someday back while urinating suddenly I fell down on washroom. Before fell down I sense that I can hear my heart beat very slowly, feeling like normal body vibration later blackout and fell down in between urine. Don't even know when I fell down my dad check me what happen to me at that time my body was shaking slowly and I'm only able to give response to my dad after 20-30 sec. I noticed that when my dad call me what happen to me I'm not able to see properly and don't even know what my dad was asking to me but later with in 20-30 second i'm able to respond properly and I don't have any problem. Due to this incident I remember that this before this earlier twice or thrice in May be past 6 years it already happened with me. But due to recent incident I'm too scared please suggest me what to do. I've done all test My doctor told me it because of sudden low blood pressure and advise me to sit and do urine. But once it happened while in gym. My age is 23. Weight 50 kg Please suggest anyone?