how soon did you start having symptoms for pregnancy?

Okay so I'm supposed to start my period in the next 7-10 days (28-30 day cycle) is it possible the gas and horrible nausea I'm experiencing is related to pregnancy symptoms or is it way too early? I don't know what else it could be from! I had ovulation pain on the 8-10 and think I ovulated on the 11th so I would be 6dpo but still not sure. Please give me your input! Thank you!