Rare ovulation

Ca

I am almost positive this month is the first month I have ovulated in a while - possibly since I got off birth control in February. I am waiting for my Dr appointment, but for the time being - what could cause this? I went to the hospital about 6 months ago due to pelvic pain and got an ultrasound and did not have any cysts but I was advised that my right ovary was just a little farther away than normal. This issue turned out to be a kidney stone so I dont think that would be related to ovulating at all.