Yaz and Infertility ?

I took Yaz when i was 19 years old. I had experienced some severe stomach pains along with fatigue, when i talked to my doctor he told me it was just too high of a prescription and put me on loestrin fe. I had to quit taking the pill due to insurance reasons when i finally got back on the pill it was due to the fact that i have missed my period for 6 months, they did all the thyroid testings and even an ultra-sound and found nothing could Yaz have caused my issues? i am back on Loestrin FE and i am still experiencing a missed period two months at a time.