Hi, Thanks for posting in HCM. I understand your concern. In the earlier episode in the month of October, although you had intercourse with two different guys, there was no chance of pregnancy as you had got your periods. Since you had intercourse with only one guy in November and then pregnancy test has turned out to be positive, he is the likely father. Although in November, you used pull out method, the failure rate seems to be high. So there is every chance that you could have become pregnant. In any case, you can confirm about it by means of DNA fingerprinting technique after the baby is born or through amniotic fluid analysis. Hope the information provided helps. All the best. Regards, Dr.Ashakiran.S., MBBS., MD.