You'd probably need to give a bit more information on your play to make a good analysis, but in general...
Pretty much everyone's natural instinct around bubble time is to tighten up - nobody wants to be the last person not to get paid. This should mean that the bubble is actually the ideal time to get aggressive, steal blinds and punish those who just want to limp into the money. Don't go crazy or anything, but some controlled aggression can usually be put to good effect here.
Depending on the size of the tournament (this is something that happens more in big MTTs than it does in STTs), be aware that there'll be a lot of people who will loosen up immediately after the bubble bursts too - they've made their goal of reaching the money, anything more is a bonus, so they'll start throwing chips around without much thought for the consequences. Again, if you change gears to suit here, you can get bumped a decent way up the payout ladder.
