From the information you have provided me with, there are a few possibilities as to what might be wrong with your laptop. The most likely of these possibilities is that your motherboard or graphics card may need to replaced. For more information on the subject and repair guides on how to fix the problem you should refer to the troubleshooting page for this device.
Hello Ashley, From what you have told me it sounds like your fan may need to be replaced or simply cleaned. For instructions on how to fix this you can refer to the troubleshooting page for this device.