I have lower back pain and lower leg pain and havent been able to maintain an erection since january, what is wrong with me?
Good question and one that's unlikely to receive a satisfactory answer via this format. I think it would be useful to know whether all these issues developed at the same time or whether the back and leg pain happened first, followed by the erectile dysfunction.
Most erectile dysfunction has a physical basis - check this article for more information. Whether your other symptoms have some neurological relationship, or are independent of your ED, is something that your doctor needs to establish.