Hi there
Its quite normal for some women to have pain around the time of ovulation and unfortunately I too suffer from the same thing (have done for years), my gp called it 'mittelschmerz' which I think means middle pain!
I also have IBS and find that it really flares up around ovulation and before and during my periods.
The pain can be really awful but I have found in the past taking a vitamin b complex helped. I havent taken them for a while and do get quite a lot of discomfort during ovulation so might start taking them again.
Hope this helps.