Irregular cycles ? Am I ovulating ?

I’m wondering what people’s thoughts are about whether or not I am ovulating based on my cycle lengths. I get a positive opk each month (timing indicated by the ovulation days listed below), but my cycles are somewhat irregular and long. My doctor thinks I am not ovulating but I am having a hard time believing this, given that I’ve gotten a positive opk each month and my cycles are not THAT long. Any thoughts would be appreciated.