 [ Symptoms ] if you have sex on the 3rd can you tell you are pregnant by the 18th [ Disease ] it is actually not me i have no doubt of the actual intercourse taking place just suspicious if it is his it seems to early to tell at 2 weeks i thought the urine tests had to be at least 3 weeks it happened once and he is been on prednisone for a long time and 2 other gout medications that i was under the impression could lower sperm count also she may or may not have been seeing someone else just before just all seems to convenient and quick