[nostrademons]

Find someone you trust that you can talk to, and talk it out. Preferably someone very even-keeled; it does no good if you talk to someone and they just freak out. Failing that, find a therapist, and talk it out.

Talk is humans' way of relieving anxiety. When you give voice to your fears and then find that other people think them nonsense (well, not nonsense, but fears, and not real problems to worry about), it tends to make them disappear in your own mind.