Ovarian Cyst a good thing

So, I’ve been seeing a fertility specialist for 10 months now (TTC for 20 months)

I’ll spare all the details but I have unexplained infertility, absolutely nothing wrong with DH and I.

I’ve been on leterzole off and on now.

This cycle they refused to prescribe because I developed a huge cyst. Blood test was fine, but cyst was big

THIS has never happened to me before. Can it also be a good sign that something worked at all??