We only had one ultrasound at 10 weeks exactly. I'm now about 16.5 weeks. We always find baby in the same spot of the right side with doppler. There is a massive bulging bump on the left that the dr has never gone over with the doppler since we can find her so quickly in her usual spot. Last night, husband and I tried to press on the bulge with the doppler and heard what sounded like another heartbeat?! Any chances that the dr has missed this and there is actually a twin or are we hearing the same one at another angle?! Either way, what else could the bulge be?? Sometimes it's more obvious than others and can be very tender if pushed on.