Thanks for the query.
1. Get your teeth cleaned by dentist
. Brush your teeth after every food, if not at least immediately after morning break-fast and last food of the day. Use soft brush and tooth paste containing fluoride
. After professional cleaning your complaint of bleeding will also stop.
2. Even after professional cleaning if you still feel the color of the tooth is yellow then you can go for teeth whitening procedure or veneers.
Hope you will appreciate the suggestions.