I'm worried because my gum line is receding fast, what do i do, what do you suggest?

Hard bristle brush?: Two main reason for gum recession. If gum recession is localized to the facial surface, it is usually improper brushing (wrong technique or wrong tooth brush). Your tooth brush should be soft bristle, not hard, not medium, just soft. Brush parallel to gum line in short, horizontal or elliptical stroke. Secondly, check with your dentist for gum disease causing bone loss and gum recession.

Bleeding gums: You may have gingivitis or/and periodontal disease. Plaque is a sticky bio film that can be removed with a toothbrush, calculus is a harder and attaches itself to the tooth and root surface and needs to be removed professionally by a hygienist or dentist. See you dentist for an evaluation.

Some thoughts...: Receding gums can come from periodontal disease, brushing too hard, or even grinding your teeth. The cause in your mouth? Impossible to tell without an exam. Please call a local dentist for an evaluation.