Bleaching and Colouring My Hair?

My hair was bleached once and my hair colour was blue at first, but it slowly turned into grey with green tones about a month ago on Feb 10 2018. That was actually my second time bleaching my hair. The first time was on November 26 2017. Is it okay for my hair to be bleached for the third time on Sunday March 35 and get a purple colour for the colouring part. (For all the times my hair was bleached, I went to a salon to get it done.) Thank you for your response.