Nako, ang 2 beats per second ay medyo mabilis na, that's around 120 heartbeats per minute na, which isn't typical for resting heart rate, so I'd really suggest you check with your doctor ASAP to make sure everything's okay! It could be something simple like stress, caffeine, or maybe dehydration, pero better safe than sorry talaga pag ganyan. One of my mum friends had similar experience and it turned out minor lang, pero she still got it checked kasi peace of mind is worth it, di ba?