Hi, Life, it sounds too close to call. There is some inconsistency between the "8 weeks 2 days" figure and the number given from a due date of May 29. 8 weeks 2 days on October 17 counts back to conception on September 3, but May 29 counts back to September 6. If September 6 were the conception date it wouldn't clarify anything anyway since the first guy would still have had viable sperm in your reproductive tract as late as September 6 or even later, meaning both guys would have had living sperm in your body at the same time. Only a DNA test can solve this one at this point.