Unfortunately, thanks to the media, society and all other bull, I think a lot of people do notice if you don't have that "Hollywood like" smile. Only thing you can really do is accept it, be confident and if anyone says anything bad just shrug it off. Takes some mental strength for this though!
My teeth are crooked also, and it's pretty much ruled my life. Of course I only have myself to blame for constantly shunning the dentists when I was a teenager - just hated going there. Getting treatment at the minute. Sure it's not cheap but it'll be worth it in the end. As soon as you get some money, try and get it sorted ASAP.