The safety pin indicates minor things which you fox easily. The dream could also indicate your childish behavior.
Dream dictionary: safety pin dream meanings
(See Pin)
(Safety pin) In a dream, a pin represents miseries and wretchedness. If the pin does not have a head in the dream, then it represents someone who offers invaluable services for a small compensation, or it could mean starting a married life with little furnishings. A pin in a dream also represents a renowned brother, or a companion who defends his friend. (Also see Peg | Skewer)