"Outlined my tooth with laser"? Usually after RCT, the tooth is prepared/reduced in size with airrotor handpiece. If you are referring to that, sometimes the tool used to reduce tooth may touch gums a little. The gums usually heals in a day or two (nothing to worry about). If laser is used, it must have been used to uncover the tooth to get more height for better retention of crown/cap. In both situations, gums do not bleed after 3hrs on its own. May be some hard food must have injured that area.