22f, HWS syndrome, Disc herniation

Hi, I have been suffering from terrible nerve pains for 4-5 years, my latest MRI results show l5-s1 disc bulge of 2mm, in medical terms M54.2 and M51.2, my doctors have referred to physiotherapy which I have done last year too but it didn't provide any relief. I just want to know how serious or bad it is, since I can't avoid the physical activities which make them worse (as my doctor suggested), I mean even walking makes the pains worse, and I can't stay immobile. Can somebody please help me with this? Many thanks :)