I have a mouth ulcer near my front bottom teeth and bleeding gums at the moment. How to get rid of them¿?

Not DIY. Bleeding gums are sign of gum infection which is associated w higher risk of heart damage, stroke, kidney/liver damage. Ulcer may be viral or bacterial. Treatment varies according to the diagnosis. You need a Dentist or a Periodontist, now, not a computer link. Please seek professional help.