I'm sorry to hear about your power supply. It just all depends on how you use the adapter and if the cord doesn't have enough slack, it will strain and you will have to purchase another power adapter. Here is a link on some tips and tricks of the magsafe adapter: http://support.apple.com/kb/HT5234 and how to reduce strain on the adapter: http://support.apple.com/kb/HT1630
You should discontinue use of it and I reccomend you to buy a new power supply.
Message was edited by: richboy247