What can you do to get your pills back?

I am 17 and i recently started to take adderall, from the first day i felt a significant difference... my mood was euphoric and i was finally able to focus and concentrate. But then summer cam along and my parents have now decided that i don't need it for the summer and i will just restart it once my school starts again. I have begged and pleaded for them to give my back the medication, without it i feel my mind being dull and groggy. I snap at everyone and am pretty cranky most of the time. Is there anything i can do to get the pills back?