Measuring smaller....

Whitney • Expecting our first on 12/30 🎄🎆
I work in Radiology and I should be 5w2d.  I have PCOS and first round of clomid.  
My tech saw a sac in my uterus was measuring under 4 weeks with nothing inside.  BUT I have a cyst on my left side (where I always get big ones) measuring a sac of 5wks. BUT it had nothing inside of it.  
I'm having all the symptoms of pregnancy. 
LMP MARCH 25
POSITIVE TEST APRIL 24
What do you think???