A or B

Went to the doctor and they said I’m in the stage of having a threatened miscarriage

They couldn’t tell me how far long I am due to me being too early

However my boyfriend asked the nurse when I could of conceived and the nurse said they count the first day of my last period which was February 4

And the nurse told my boyfriend that I probably conceived some time in January

I had sex with guy A in January but came on my period February 4 and had sex for 6 days straight after my period

So now he thinks the baby is guy A and I told him it can’t be