Measured 4 instead of 6 weeks

Lo

Ahhh so I booked an early scan because I had spotting and i was worried according to my LMP I should be 6 weeks but I went today I was only measuring 3-4 weeks no pole or yolk yet just a sac, I don’t have much hope now to be honest and he asked to see me again in 2 weeks. I normally have regular cycles with a one off longer one every now and then and I don’t track ovulation but all apps I have said I should have been 6+3. This is a nightmare now I’m just disappointed and sad.

Anyone had anything similar?