dogboy

ok i gotta pitbull and this my first girl dog ever now like when will i notice that she is really pregnant or if like it could be a false preg .

another thing is i have two males they are brothers been togther since day one and like it wanst suppose to happen this way i found the girl dog roaming the streets looked in ok shape just alil skinny i fed her good i dont really know about the cycle to much and like i looked away one day and my oldest dog was stuck to her it happen so fast. ok now like his brother did it to and like i cant stop the i tried keepin them outsude but they cry all night long then when she hears them she starts. like since bothe of them tagged her will this increase her litter size or any type of danger