When you dream of the hedgehog, then such dream represents the gentle aspects of your personality. Perhaps you are very sensitive to the others opinions about you. Try to be more positive and dont mind what other are saying to you.
Dream dictionary: hedgehog dream meanings
Hedgehogs in the dreams are an omen of fights, persecutions and disappointments.
(See Porcupine)
(Hedgehog) In a dream, a porcupine represents someone who is constantly depressed, easily annoyed, who quickly gets angry and who has little compassion. A porcupine in a dream also represents deceit, spying, betraying someone, hiding, or evil.