Nervous wreck

Denelle
Went for an u/s today and was told that a G/S is seen but no little peanut yet. Going off of my lmp I should be 7weeks. The tech said I may not be as far as calculated and scheduled me for a follow up in 2 weeks. Oh and I'm spotting dark brown but no cramping. Trying to be positive and optimistic but it's so nerve wrecking.