Havin a hard time determining my face shape. Im guessin heart????

First off, Id like to say Im looking to choose a new hair style, and would like to choose one that would suit my face shape best. However, Im havin a hard time deciding wut my face shape may be..Im leanin more towards a heart..but Im still confused between a oval or even a diamond. I greatly appreciate sum advice.. Thanks Much!!! Heres a pic...