So on October 17-19th I had sex with guy #1. I got my period on october 21st, I think. (It was a tuesday) I had it until the following Sunday. I then had sex with man number 2 between october 31st-November 9th. I kept testing negative. I tested neg October 28th, November 4th, Novemeber 10th and I think Nov 18th. I finally got a positive on Nov 24th and had an hcg level of 170 on Nov 25th than an hcg of 311 on the 27th. I had an ultrasound on Dec 1 (vaginal) no yolk sac, fetal pole or anything. sac measuring 4.1 mm. Then dec 20th I had one at 8w6 days baby measuring 7 w 2 days. Then on jan 20th I had one at 12w 6 days baby measuring about 11w 2 days/11 w 4 days. My question is who is the father? Im going to get the prenatal dna test but I would like some reassuring because I feel sick to my stomach over this for the past how many months. Is it possible it could be from october 17-19th???