Severe insomnia

Hello, this is my first time posting on this forum...I have had progressively worsening insomnia for 3 months now and have had almost all symptoms of sfi. I am really scared as i am only 21 and have so much to live for. I have so far bad constipation, constricted pupils, lack of pain all around my body and numbness, visual disturbances (eyesight is getting worse everyday),short term memory loss, apathy and tinnitus. My doctor says that it is all anxiety but surely if it is all psychological i wouldn't have these symptoms as a consequence. I have a history of healthy anxiety and GAD. Could it all be just anxiety? Nowadays I have very vivid dreams if i sleep of what has happened the day before but don't feel refreshed when I have sleep. This has to be the worst period of my life..I just want my life back. Has anybody ever had this happen to them and then they recovered? Thank you x