So I'm not sure about this so i figured i would ask before i call my doctor with this concern. So i have an at home monitor. And so far the last few times i have used it i have picked up my heart beat and then two fast heart beats one on my right side and one on my left. I'm only 12 weeks along. And i don't think it is twins. But at the same time I'm a little confused. I also heard movement on both sides but I'm wondering if baby wasn't just swimming to the monitor. Cause when i moved it to my right side there was no heart beat but then i heard baby move and then heard the heart beat. Lol idk. I just want to know have any of you experienced this before and what was the outcome? Also i had a sono when i was 6 weeks along. But baby was so tiny that you just never know if one could have been hiding.