Thanks to everyone who replied!

There is no longer any pain in my arm so once again its just pain going down my leg.

I was asked to elaborate on the pain, as well as to elaborate on the exercises i have been given.

So firstly the pain occurs when i bend over, and the pain starts from my lower back and extends no further than my knee. The pain is also at the back of my leg. In addition my lower back gets aggravated and starts getting dull pain if i sit for prolonged periods.

My physio gave me this exercise to do where its sort of like a push up but the aim is so that you bend your body backwards and hence relieving the pressure in your lower back. I do those regularly and theyre good at keeping pain away.

I guess right now im not in any urgent pain or seeking immediate attention but i would feel safer knowing what my options are at this point.

Thanks to all the knowledgeable people out there!

P.S oh and also my pain didnt suddenly start from any injuries or anything like that. It was a gradual thing, but i do take care of my posture now especially when sitting and exercising.