Confused IV now had 2 docs tell me lump in collarbone is gland and third doc tell me a cyste all 3 say its fine can I now relax very movable lump?

How big? . If the lump is easily movable, and three doctors told you it was benign, i would believe them. But if the limp is large, say the size of a walnut or bigger, you may wish to have it removed for a pathology examination.