Serious question. Google didn't help?!

Ok so I've been taking conceive easy from fertibella. For about 3 weeks now. It says it can also regulate ur periods. I have a 34-39 day cycle. And I ovulated around the 9/ a + opk both days so my question is if it did regulate my cycle to a 28 days cycle I'd be starting around the 16 right. And I've been having cramps ever since ovulation started. Is it possible to get a period that early after ovulation? Anyone please I Googled it but no help.