I am a 23 year old healthy female, who is 18 weeks pregnant. I was laying on the couch watching tv and my heart just started racing. I counted twice. It’s beating roughly 160 times per minute. This has happened before but not recently. Usually I am up moving around when it happens. But to be just laying still on the couch it just seems very odd. It’s been doing this for about 15/20 minutes now and still going.