IVF treatment

I’ve currently undergone <a href="https://glowing.com/glow-fertility-program">IVF</a> treatment, I’m 7 days post egg transfer. I’ve had cramping today in lower abdomen and back. Has anyone had these symptoms and had a successful outcome? I’ve also been asked to go in on Friday 23rd for my blood test which will be 9 days post transfer. Is this not too soon to test? I thought it was 14 day wait?