I Fainted I Don't Remember They Say I Fell And

I fainted I don't remember they say I fell and was out about 20 seconds my eyes were opened I was very pale and sweaty I take medicine for high blood preasure I was also having spotty and blurred vision by blood preasure was so low it would not read on the meter after about a half hour it started to read on the meter a n hour later my blood preasure was normal I did make a appointment to see the Dr should I be worried ?