not too sure how long you have left, what strain is it? it has to be at least three weeks, the majority of the hairs are still bright white.
did you mean 5.6? or 5 through 6? 5.6 six is good, i like mine there abouts. it would be okay to flush, that's the safe option, just start all over and maybe keep the ppms the same but supplement more micro nutes, she also looks like she could use a bit of P (purple stems) these are the days when she is putting on most weight.