-you should only change the passwords that are the same as your PSN password. i personally would advise that on those accounts that share the same password as PSN that you also change the security questions, if any. that way if the hacker(s) know(s) your mom's maiden name now, you can change it to childhood best friend or whatever.
-i wouldn't go overboard on checking your bank account. it usually takes a few days for a charge to go in, and finish processing, so you'll be able to spot something and catch it if it were to come down to that. make sure to contact sony FIRST if a fraudulent charge comes up so that you can put your official "i think mine was compromised" statement in with them. otherwise your bank will take all the action first and block sony. this happened to me a while back when someone got into my paypal and sent themselves a bunch of money. paypal got blocked from investigating and tracking down the hacker because my bank acted first and fucked up the trail he/she left behind. (if any)
everything will work out man. worrying solves nothing. trust me, i have severe anxiety problems. think of the worst that could happen. (you dying) now think of how ridiculous it is that this whole debacle could somehow physically kill you. that's what i do to make myself feel better.