Period 11 days late

My period is now going on 11 days late and I have yet to start. I am always on time with starting my period and this app is so accurate about my start days. Me and my boyfriend had unprotected sex last month and now I’m at a cross roads and don’t know what to do at this point since we live with my mom and she doesn’t want me to have a baby even though I’m 22 and he’s 23. Advice please