I have been suffering from lower back pain on my left side but usually have it on my right side. the pain goes doen my leg and i have 3 numb toes?

Back Pain/Leg Numb: You will have to bring up these complaints to your primary care doctor, as he/she will start you on a regimen of conservative treatments. These usually will work for most patients. If it fails after 4-6 weeks for trying them, or if you experience weakness, changes in your bowel or bladder function, then you will need imaging work-up and will need to be evaluated by a spine surgeon.

Sounds sciatic : It sounds like you have been having back pain due to a disc problem that has now most likely herniated causing not only the back pain more localized to the side it herniated but is now pinching a nerve creating pain down the leg & resulting in the numb feeling in toes. 90% get better non operatively. If there is any further development of weakness in the leg or bowel/bladder symptoms see doctor.

You may have one : Problem or more than one. For example you may have sciatica with a neuroma. They are 2 separate conditions.