I just had my hair cut and now I'm worried/concerned [about how I look]. 为什么牵挂？不久就会长出来。哈哈。

我试试看，不知道行不行： What gets shorn is my long hair, along with my lone concern 原文里你没强调是“长发”，但因为你这话是有双重含义的，我根据你的意境来：long和lone对应，同时long也有某种盼望的意思，剪去 / 夺去（shorn）了这种盼望，也就只有lone了。希望对你有帮助吧

I have had my hair cut, my miss too.呵呵呵~~