@richwoohah: I'm not sure about this one. The triangular icon on the right looks like the standard 'Share' icon however I'm not really able to make out the circular part on the left. Are you able to provide a clearer image in the form of a screenshot and I will look into this further for you.
Thanks for this. The image is still slightly blurry, so it's difficult to say! It could be a third party app. Try popping your phone in Safe Mode and seeing if it disappears. To do this, power your phone completely off and turn it back on again. As soon as it starts turning on, press and hold the Volume Down button, until you’re back to your home screen. Safe Mode will be displayed in the bottom left-hand corner.