Ok,
Well... Me & my boyfriend broke up for 4 months .
I had sex with one of my guy friends Sept 10th . [ the guy pulled out ] .
Get my period around the end of Sept. [ not sure the exact days ] .
Me & my boyfriend got back together the middle of my period and had sex from there on . [ he did not pull out ] .
I missed my period in Oct .
Reffering to my 20 week ultrasound I am due june 29th .
Could i have mistaken my period for implantion bleeding[ i dont know how long or light it was ] & the guy i had sex with on the 10th be the father ?