I am a female, 60 years old and have psoriatic and rheumatoid arthritis and fibromyalgia. Three months ago my rheumatologist added 300mg of Gabapentin to my daily treatment to help alleviate pain along with my Enbrel. He increased the dosage to 600mg three weeks ago. I developed horrific anxiety with the most debilitating thoughts that I could ever imagine. I have not been able to sleep for more than 45 minutes at a time during these 3 weeks. My doctor had me go back to the 300mg dosage, but the horrible thoughts are still consuming me daily. What can I do to stop this anxiety?