Hi Yammy
I'm so very sorry for your loss. I lost my Father very suddenly and unexpectedly many years ago and I felt as if I'd been both physically and mentally assaulted. The pain and despair felt unbearable. But we are hugely resilient, we can cope when we have to. You will run through the full gambit of emotions, despair, terrible sorrow, anger, guilt and so many more: rationale can just disappear in these sad times. However, you will get through this.
Allow yourself time to grieve and don't be embarrassed to do so. Your pain will be palpable but you'll get through, you'll manage. It will take a while but you will gradually realise that you are able to think of the good times you spent together and be able to smile when remembering him.
I send you my love xx