hi i am a 17 year old boy and i have been having back pain for about 8 weeks now or more and been getting pains  down my legs and my bum my mum thinks its saiteca or something but my left testicale has been hurting for a few and i am really worried and i have only just starting to get arm pit hair is this me going through the whole stage of puberty?
After going through your query I came to know that you are probably suffering from lumbar disc prolapse. It can be confirmed by MRI scan. There are two treatment options. First option is rest in position of relief(generally lateral position with both knee bend), neurotopics such as mecobalamin and analgesics (Diclofenac three times a day after meals is effective). Sometimes strong analgesic(such as tramadol three times a day after meals) is required. Omeprazole before meals prevent acidity caused by analgesics. Second option is go for surgical operation(Discectomy).  You can discuss with your treating Doctor about it. I do hope that you have found something helpful, and I will be glad to answer any further query. Take care.