Is 2 weeks after long enough to take a pregnancy test?

had on June 20th took a test On July 6th and the results were negative. Im on Depo provera and my partner has had a vasectomy for 4 years. We used a condom MID WAY through right before he d but pre may have been present I try and be soo careful and I get freaked! I dont want this to ruin my love life! :(