Herniated disk

Hello , I am 26 years old i am climbing about 9 years now .... Last year after a period of pain at my buttock and then on my  right leg things get from bad to worse.. so doctors said i was for surgery but i didn't want to cut me. So i started conservative treatment with exersise some streching a lot of swimming and visiting my physiotherapist. There was a lot of pain for about 4 months... the time passed i started walking , continiue swimming and now i want to get back on climbing .... What should i do ? can you help ? any specific exersices?? thank you in advance !