Compression fracture in backbone. Not?

Sir, In an car accident before 8 month i have compression fracture in BACKBONE in D6,D7 and D8 vertebrae (this is to inform you that after accident i was admitted for 6 days in hospital and after dischage my doctor is not advised to do the bed rest for 3 month ,they advised me to only do the rest for 15days only that means i was on bedrest for 21 days only ),and after 3 month i have again the pain on my injury i have again go for MRI and than the problem was same the compression fracture was there. Sir now sometimes i have again pain and burning like sensation at injury side . And on prolong sitting of 30 minutes i have numbness in my left leg and both of the hand 1)so after 8 month of injury why the problem is present . 2)the fracture is healed or not ? 3)My job is field work marketing ,i have to ride the bike 70 km in a day ,so now can i ride on bike or not ? Or avoid the bike riding.