help please: when did I ovulate?

Mi

Hi ladies, I really need help on when I actually ovulated: I had my period from the 29 Dec 17 until the 3/4 Jan 18. I had an LH surge (OPK test used) on the 9th and 10th Jan and I had pain in my lower left abdomin on the 9th Jan. I also had egg white CM on the 7th, 8th and 9th Jan making me think that I had pains during ovulation because I didn't have egg white CM on the 10th Jan. I know that after an LH surge you ovulate 24-48 hours later but this is all so confusing! please help me calculate when I ovulated, I think it was the 9th Jan.