We need to know who the dad is?

We need to know who the dad is?
Slept with guy A 31March/1 April and he did not come in me we didnt even finsh guilt got the better of me....I had my cycle the 4/5 April came off 10th and had sex with guy B everyday as he said he wanted me to be his baby mamma with him coming in me all the time! I toook a test the 6th may and it was positve and had a scan at 15 weeks gest age 12 weeks fetus age. I remeber having ovulation discharge on the 21st and also remeber being very very dry with guy A then i had the baby 10th of Jan.

In advance we thank you guy