Ovulation symptoms?

Jaicee

I had a chemical in August and my last period was Sept 5th. My cycles tend to lean towards 22-28 days more often less than 28 days in suppose to ovulate this Wednesday but ive been having waves of nausea and headaches for the past 4 days which ive never had mid cycle. Is it possible that with a shorter cycle I could ovulate sooner than CD 14.