I had my last period on 28th on Dec. I had sex 2 days before I ovulated and the day I did ovulate. This was 9 days ago. My next period is due in 6 days. When would I be able to find out if I am pregnant?

Typically the first period after you might have possibly gotten pregnant.  I would recommend taking a pregnancy test around that time if you think you might have gotten pregnant.

I would use protection while you are waiting to find out if you pregnant, if you do not wish to become pregnant.  Just in case you are not already pregnant.  Charting when you ovulate is not a fool proof method and their are many way you might get pregnant if this is your only method of pregnancy protection.