Well I had my OB appointment today and my heart rate was about 126 beats per minute which is very…

Well I had my OB appointment today and my heart rate was about 126 beats per minute which is very fast. I also had my heart skip a beat 7 different times during the full minute and I always feel like I'm about to pass out. Doctor says to monitor it, as it can be normal for pregnant women to have this and I need to rest as soon as it happens. It feels very constricting and I don't understand how that can be just normal.