HCG levels = 7 weeks but no fetal pole

Pamelia
Hi all. We are pregnant with our first baby. A little background, I have PCOS and my last medroxyprogesterone induced cycle was April 30th. After that date I have 3 rounds of different fertility Meds. May 18th was the last dose of gonal-f. After much deliberation my husband and I decided to stop the <a href="https://glowing.com/glow-fertility-program">fertility treatment</a> since our follicles still weren't large enough for an <a href="https://glowing.com/glow-fertility-program">IUI</a>. I tested positive on about 8 home pregnancy tests June 12th. 
My HCG levels are 14920 today but all they can see on an ultrasound is the gestational sac and yolk sac. A little concerned and confused! Anyone else have something similar?