I'm afraid I can't offer you a diagnosis but the problems are indeed likely to stem from your lower back.
Please visit my lower back pain page and you'll find a number of exercises described and demonstrated that I have found very helpful (I've not had an attack of lower back pain for at least 2 years). I hope they help. Please try to follow the exercises every other day, they only take 5 minutes to complete.
Best wishes
Earle
Do you have questions? Please feel free to ask.
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