Had sex Oct. 12th w/ Thing 1.... had a normal, 7 day period Oct. 25th. Had sex with Thing 2 Nov. 2 & 13. Had a test on the 20th - neg. Had another 23rd - positive. Question: its easy enough to figure the high chances of Thing 2 being the culprit, BUT what about Thing 1?... any possibility?? Thanks in advance :)