When did i ovulate and can i become pregnant?

hello everyone. ok so i was taking the first response daily ovulation kit and got my first positive this past friday on the 17th. i tested for the next two days after that and was still getting positives. can anyone tell me WHEN i might have ovulated? also intercourse with hubby took place every day from the 13th until the 20th, and again i got my first positive ovulation test on the 17th. when might have i ovulated, and what are the chances i will become pregnant? oh, and is it normal to have more than one positive test for the lh surge/? three days straight? thanks for your help!