I wouldn't feel stupid, it's one of the oldest mistakes in the book and everyone makes it at one time or another.
Luck can play cruel tricks on you. Somewhere out there is probably some lucky sod who's won the hotpicks 2 prize 4 draws in a row or something (which has odds even tinier than the chances of losing 800 times in a row, I think). At the other side of the coin are the stories of people who buy the same numbers every week except once when they were too late to the newsagent, on the very same draw that their numbers finally came up. Or the woman who entered two separate lotteries with a different set of numbers and managed to match every single number, but unfortunately on the wrong tickets (So she had something like 4, 8, 15, 16, 23 42 in the draw that came up 2, 3, 5, 7, 11, 13, and 2, 3, 5, 7, 11, 13 in the draw that gave 4, 8, 15, 16, 23, 42). All you can do is either keep playing and hope that this time you numbers will come up (1 in 79 chance) or stop playing, and curse your luck when it only takes another two or three draws for you to finally win. By about now, given the size of the prize, I'd cut your losses and stop now, unless you are entering the main draw as well (but I don't know how the Lotto hotpicks works so not sure if that's possible without staking more money).