How To Treat Constant Stress,panic Attack And Insomnia?

I have experienced constant emotional stress for past 5 months and have experienced: weight loss, insomnia, acute panic attacks, chest pains, hair loss and stomach discomfort (bloating, cramps, nausea, soreness) lasting 8 days now. Thinking of the stress, doing physical activity, eating, not-eating cause stomach discomfort every day since December 28th. What is wrong with me?