Very surprise

I went for my 8 weeks ultrasound today. Baby was measuring smaller that 8 weeks. Baby was only measuring 6w2ds. I was so surprise. It was so hard to even find the heart beat mind you the tech was a little bit rude which just made me feel so much worse. I am feeling a little bit down but I am glad baby has a heart beat and everything is looking fine. Is or has anybody been in the same situation???