HELP!!!!!

Tei-Ana • Im 18 and counting! Im a mommy to be, and yes this is my first pregnancy. ❤️ im extremely excited and blessed!
Hey guys, so i recently went to a local pregnancy center and got a sonogram from a nurse! Well i have irregular periods and my last period was in November or October. The nurse went off of my last period thinking i was 11weeks, so she was measuring my uterus thinking it was my baby, i know its crazy but she was really sweet and i was trying to check up on my baby as soon as i could. Well here is my sonogram picture, could anyone give me there opinion on how far long yall think i am?? The nurse ended up telling me i just ovulated really late after my period. And that by looking at the sonogram im in my early pregnancy! But the baby is so small she couldnt measure it. She has a really old sonogram machine, the one where you measure a babies heartbeat and cant actually hear it.