Secondly, I don't have regular periods (ie: 28 days cycles etc...) My period varies from the longest being over 70 days to my most recent being about 34 days.
I would think that you would be ovulating, although you would find it to be harder to calculate when you ovulate because of the length of your cycles. In addition, just because you have a cycle of 28 days, doesn't mean you will ovulate smack bang in the middle of the cycle ie: at 14 days.
Have you thought about charting (taking temp) or even monitoring your cervical mucas to give you a better indication or ovulation dates?
For me, it was too difficult so I am seeing a Naturopath who is helping to shorten my cycles and producing more signs of ovulation to help. - Is this something you can do or even perhaps see your GP to discuss further?
Bookmarks