Your problem of ED seems to be neurologic in nature.However the exact severity cannot be pointed at this time.The nerve
supply needed for erection is coordinated from the central areas of brain(hypothalamus
)and the spinal centres at the level of lumbar and sacral levels.
Since you have been improving with your other functions,there is a chance that ED will also improve.Mean while you should visit a urologist
for a check and medical line of management of ED.
All the best