Hello Friend, Good that you are seeking a help. As you are going through medicine for so long years and still undergoing the problem, let me share a different perspective of your problem through Ayurveda angle. In general anxiety related issues are caused due to imbalanced air energy in body or called Vata . As body and mind are interlinked, such imbalance can also influence body condition through sleeplessness, nervousness, constipation, palpitations, headaches etc.. So it's better to take a holistic approach in isolating the root cause and the follow a suitable treatment plan. In ayurveda the solution are like home remedies, few daily routine changes, dietary, and self therapies and some supplements medicine.