I've never heard anything about massage disrupting a cycle. I say you're fine to get your massage. It will help you feel less stressed and more relaxed, and that can't be bad, and if you're at the point where you are scrutinizing every little thing you do around the time of ovulation for possible disruptions, then I think you're putting a little too much pressure on yourself. Stress like this can be a major obstacle when trying to conceive, as any doctor will tell you.