Bite issues

[braciefacie]

Hey guys, as I said in my 'Waiting for retainers' thread, I recently got debraced. But since the brace, I've noticed that my back molars don't meet anymore when I smile or close my mouth. I also have noticed that I've developed a slight lisp now that I've gotten my braces off (I never had a lisp when I had braces). Is this normal?