Long period???

I have been bleeding every day for 18 days. The amount varies. Sometimes a lot sometimes hardly anything. Sometimes dark red and at times pinkish or orangish. Me & SO have been having unprotected sex as we are ttc our rainbow. I haven’t been cramping or anything else I usually feel with a period. I don’t have any kind of infection and aren’t having any symptoms besides this long period ? Have any of you ladies experienced this? Could I be pregnant ?