If me and my husband had sex on the day i know i ovulated should i be pregnant ?

Not "should": The stars have to be aligned. One cannot say, "I should be pregnant." Rather, saying, "I may be pregnant" is more realistic. It is impossible to know the moment of ovulation unless there is some sort of camera involved. The fertilizable egg is able to be fertilized for just a day, and during that time, fertile sperm (at least one) have to make it to the egg. More factors are involved after that...