Spotting

Tammy
Hi , 
I'm kind of worried ....
I'm after <a href="https://glowing.com/glow-fertility-program">Ivf</a> cycle ,  15 day after embryo transfer  I am pregnant too ....
What I'm worried about is on the 11 day I had some spotting and it went away now I have it again on the 15 day . 
Is that normal or should I go to the doctor ?