I will answer the questions starting with your Spinal injury. If your "regular" doctor indicates that the achilles tendenitis is secondary to your spinal injury, then you should reopen your case and continue with the same case. However, this injury does not seem to be related to the original injury. If this is caused by prolonged standing or other factors over a period of time, then you have a new claim for continuous trauma. Depression or any type of psychological injury is very difficult to prove since you have to show that you pass a threshold of 50% before the case is accepted.