I stil suck my thumb and im 30 is their something wrong about that?

Yes: Besides being embarrassing in public it will dry out the skin on your thumb and possible damage the nail. It is better than smoking. Most pediatricians who deal with use a weapon by recommending painting thumb with unpleasant taste. Consider doing that

Psychotherapy: I really hate to sound like a freudian, but what you describe is a need for increased oral stimulation that suggests a developmental issue that could be addressed with insight-oriented psychotherapy. It is not fast, but is thorough.