nub theory?

Marli • Lottie Mae norm 3-23-20. Liam Thomas🌈 born 4-7-17. Angel baby 5-4-16. Hubby & I married 11-1-14. Have two Pomeranian `babies`.
I don't know that you can even SEE a nub! Baby wouldn't cooperate at all. Legs crossed. Weird positions. But, I'd love guesses. It's KILLING me waiting on progenity. 
12+3
And last week. 11 weeks 3 days.