TTC second child while having PCOS

I am 26 and ttc my second child. I have been trying to get pregnant for 4 years with my boyfriend. I have PCOS to make things worse. I also had a miscarriage in May of 2013. We haven’t used protection or anything and I have been keeping track of when I am ovulating based on the <a href="">glow app</a>. But I’ve often wondered if the ovulation part isn’t correct. What can I do at home to check to see if I am actually ovulating? Any help would be appreciated!