About left leg limping during stand and.

Hello sir and mam🙏 My daughter is only 14 months old. At first she crawling very actively But suddenly on Feb16 she start limping left leg during crawling.so we visited near by pediatrician he gave ibruprofe. And. Some calcium vitamin etc.After 1 month situation is getting worse So we visited then doc advised to do xray We did xray.after that my doc said to do vitD test. We also doing test the. My daúghter vitamin level is 62.37. So my doc said that my baby vitD low so he prescribed 60K vitamin drop.we used but not getting result.Day by day my doc situation is worsening.She can't crawl or stand by using left leg.But she is very active.She starting crying bybecause she can't able to playing as before.At firstly she is very actively crawled and played . Please suggest something sir🙏