Does indirect belief in magic make me a disbeliever?

I have constant feelings of doubt in magic . I constantly tell myself that I do believe in it, however I feel that I don't and only think that I do due to fear of Allah. A few days ago I had this thought "If I really do believe can I swear by Allah that it is true?" And I couldn't bring myself to do so. Am I a disbeliever and if I am, how do I start believing?