A different downswing question

[Doc7]

After 3k hands of negative BB/100, is there anything tell-tale that I can check to see if this is a downswing or simply bad play? I stuck my worst money loss session in that PokerGrader website and all the results had big red "BAD LUCK" next to them, but I don't know how reputable that website is around here...

is there such a thing as "You spent 22.50 on SSHE so now here's a 22.50 drop in bankroll"? (it's not quite that bad, at .05/.10 it's more like 10 dollars...still depressing, but I'm not sure that luck is entirely/mostly to blame)