Hidden twin?

Martha • IG: marthalilith snow, dogs and fitness🐶❄️ Due July 2018🍼

Had my second ultrasound today at 8+5, baby is doing well but the obgyn wasn’t sure if there was something behind the baby, like a second baby. We saw something but it might just be some bad reflection or something or actually a baby. Did that happen to anybody else and they actually had twins?