What effects can to much worrying & stress cause?

Anything!: Anything at all - every person is different. Stomach pain, weight loss, weight gain, headache, back pain, insomnia, excessive sleep, fatigue, anxiety.....Cancer, gall bladder disease, reflux, .The list goes on and on. Please try to address the stressors under your control, develop positive coping mechanisms (yoga, exercise, meditation, therapy or whatever!) and address your symptoms with your md.

Stress: Stress symptoms can include feeling nervous or irritable, muscle tension (especially in neck, shoulders ; back), poor quality or minimal sleep, lack of concentration ; easy fatiguability. Lump in throat or butterfly in stomach sensation can occur.