Implantation bleeding

Amy • Tracking fertility as trying to fall pregnant. Been trying for 3 months now and obviously hasn`t happened.
Hello all, just a quick question... Do you always have implantation bleeding when falling pregnant? If so how quickly does it take to get this bleed? Is it straight away or a week later? Only a few days post ovulation and can't wait to find out of this was my month but I haven't had any implamentation bleeding...