5 week ultrasound question

Went in for 5 week ultrasound and couldn’t see anything ... no sac nothing! 😔

Doc thinks I’m actually earlier and that I ovulated late. Totally possible bc husband and I had sex a few days after I thought I ovulated... oops. 😅

I’m having cramps sometimes but no bleeding. Doc said not to worry but has this happened to you all at 5 weeks or less???

To clarify: the question is whether any of you all went in for 5 week ultrasound and saw nothing at that time but had a perfectly normal pregnancy.