welcome to hcm forum
as per your history you have pricking pain in the leg
, you have not mention wheter it is in the thigh or in the calf, this time the back pain
you had what triggered, like you had fall or you had lifted the weightt, or you where travelling in the bus or any other cause,but you have said that you had the back pain which came and went on the rest .
anyway, the history that u gave i would like to rule out IVDP
or meralagia parasthesia,
i would advice you to meet an orthopaediccian who will examine and treat accordingly. for the time being you can take rest, not bend forward, not to lift weight and analgesics
wish you early recovery