I need a little bit more info to help. So did you open the system? You do not need to bleed the brakes unless you opened the system(changed a part of the hydrualic system). A flush of the brake fluid is essetial as routine maintance every 3 years, but air will rarely form in the lines unless you ran your master cylinder dry or you opened part of the system. Is it hard to push the pedal? or is the pedal very spongy? Let me know exactly how and what you bled and I will be able to help you out.