Af is late

Samantha

Ladies I need some help here I’m freaking out... so me and my sons dad have been have unprotected sex even know we are not together af was due the 13 and nothing... I started spotting one the 15th nothing the 16th spotting the 16 nothing the 17-18 and spotting this morning but had a blood clot in it but haven’t had anything all day other then that.. what should I do..... please help me out...