I've had sex with 3 different guys the last month and my period is late but all the pregnancy tests I've taken have been negative but I'm also on the pill which can mess up your period but i have 2 main problems I'm a teen and I asked my mom to go to the OBGYN and she said it wasn't necessary so she won't take me and all these guys live in different states so if I end up being pregnant I don't know who it is and I don't know howd id do DNA tests