Twins or random spot?

Taylor

So I got a vaginal ultrasound on Monday and this girl was kinda rude. First she didn’t put enough lube on it and it hurt and she’s like it’ll be fine. Then when she moved it I seen something behind the the sac of my baby. It was dark and I only caught a glimpse I asked her what it was and she’s like nothing. ( it took like 10 mins for the whole ultrasound) Anyone else have this happen and they have twins?

I circled where I seen it