Really sorry to hear about your nan - I'd like to pass on my condolences to you and the rest of your family.
Allow yourself to feel whatever you are feeling - you need to express your emotion, like everyone else does in their own ways. Take things at your own pace - everyone processes things at their own pace, so look after yourself.
This is one major event in your life, that you will carry at the back of your mind for the rest of your life. However, if you allow yourself to process what is going on and just feel, you will be able to withstand the impact - one event does not have to derail your progress!x
Much love <3