Baby Daddy?

In the beggining of September I had sex with GuyA, a man I was dating at the time. He lives out of town and when I visited him we had sex everyday while i was there, September 1st-4th. Upon returning home, my period was a week early. A month goes by, and my period is 6 days late. My periods are normally pretty heavy and 4 days long, during this time my periods were very light, only 2 days long and I had no period symptoms (sore breasts, cramping ect) Me and GuyA broke up. I hooked up with GuyB, A man I had been previously talking to earlier this year, just once October 26th. Fast forward to now, my period is 10 days late and I had two positive pregnancy tests. Im not exactly sure which one could be the father. Id like to know yalls opinions on who it could be?