Can you still bleed if your pregnant

It's Been About 2 Month Well I Get To 3 Month And The pain Is Unreal The Bleeding To What Could This Be Im All Bang On Ever 28 Days I Bleed And Some Month It's So Painful And The Cramps Are Like Giving Birth Could There Be Something Serious Like I Feel Im Getting Pregnant And Bleed Bad 3 Month Please Help My Body Is Working I Ovulate My cm Is Perfect Hope Some One Can Help sarah