15 weeks and 6 days

Today I had a cervical check up due to being high risk. After they checked my cervix they did an ultrasound to check the heartbeat and fluids of the baby. I asked if they can tell gender but she said its too early that I go back in two weeks for an anatomy so by that time she can know for sure. I was looking at the screen and I saw the legs and clearly saw nothing handing and I saw three lines in. She said she can tell me what she thinks it is but I told her I'll Wait. but I did see in between the legs. I was thinking girl but idk if its to early to know. I dont want to be excited. I already have three boys so I know how it looks like but I've never had an ultrasound this early with my boys so idk if at this time it looks the same. what do you all think?