Is this a federal offense?

i am 21 and stay with my boyfriend for 99% of the time. my mail is still sent home, but for the last few months i haven't been receiving a bill for school and thought it was a bit suspicious. a week ago i was asked by the financial director why i haven't been paying my payments and i told them i assumed i was caught up due to not recieving billing. today, i found the last 4 months of my bills in a dresser drawer of my mothers opened and put together, along with my loan statements, and a photocopy of a check issued in my name as my state tax return, but i never recieved this? what can i do about this, it's getting out of hand at this point i could have been terminated from school.