2 Day Period Impact on Infertility?

Nicole
Hi ladies. I thought I'd post in this group, since I'm at the very beginning of going through fertility treament (<a href="https://glowing.com/glow-fertility-program">IVF</a>). My periods went from 4-5 days and really heavy to only 2 days max in one year. The first day is really heavy but that's it. 
I've asked my doc and he's sort of breezed over it. In the middle of a full set of tests but thought I'd ask of anyone has experienced and what it could be?
Thanks!