Help!

CLARA

This is my first and I am beyond excited. I have about 12 more days till I find out the gender. Thursday I had an ultrasound and the tech said she thinks its a boy. (By the way I was 12 weeks Thursday) I didn't see anything that resembled my nephews ultrasounds. For the longest time I thought it was a girl, so did my mom. My MIL thought it was a boy but later is unsure she goes back and forth. Any guesses. The obviously smaller baby ultrasound was at 8 weeks 3 days (I work nights and when asked about my period I gave the wrong date making my gestation wrong on the ultrasound). The bigger baby was 12 weeks 2 days. Just wondering what others think.