You did 2 times sex with diff guy i.e. on 5th & 14th Nov. Your last period finished on 30th Oct and you are carrying 7 wk plus pregnancy
with EDD 5/8/2013.
So your ovulation occurred around 14-16th Nov if previous cycle was regular.Here probability of father is 2nd Guy as after ovulation ovum lives only 24 hrs whether sperm can live 3 days inside vagina/ cervix
Better to do a DNA test to confirm paternity.Consult with your gynecologist and do periodic check up. Take folic acid
supplements and protein rich diet. Avoid heavy work,stress
and need adequate rest.