Your Toothbrush should be replaced every three months. Sooner if your the type that tears a toothbrush head to bits in a shorter time.
If your gums bleed when you brush you may be brushing too hard, have too heavy of a brush bristle or it may be a dental problem and you should visit your dentist.
Toothbrush Bristles can harbor bacteria, so rinse it well before and after brushing and it also doesn’t hurt to let it soak in a good mouthwash like Listerine overnight.
Oral Hygiene is more of a preventative maintenance than anything. If you keep small problems from happening it will keep the big ones from happening as well.
Lastly, use only products approved by the American Dental Association (ADA). You’ll see the logo on the back of the product container.