I would advise you to visit a Psychiatrist (I'm not sure if you were in touch with one, or were visiting a general physician) and have yourself evaluated thoroughly. It may be so that you're having another depressive episode (the sleep disturbance may be a warning sign) and must be treated properly. Clonazepam alone would give you relief temporarily, but will not help with depression, which, I believe, is the cause of the sleep disturbance in the first place.
Next Steps
Consult a Psychiatrist at your earliest convenience
Health Tips
Maintain Sleep Hygiene: follow a proper sleep schedule, do not use your mobile just before going to sleep, read a book (no e books) before you go to sleep, try clearing your head of all thoughts when you lie down and focus on your breathing.