So very sorry. Lost my mom 7 years ago and my Dad 1 1/2 years ago. Mom was expected, Dad not so much. I talked on the phone to my Dad, an hour later got a call saying he had passed. At least I had said how much I loved him... Right now there is a lot of pain. Despite the hassle of making arrangements, that also keeps you busy, which can be a good thing. Right now everything that reminds you of him is gonna hurt, will stab you with your recent loss. It is trite to say, but true, that time heals. Eventually you will remember the good, and won't feel the pain as much, and eventually the good memories will bring you better feelings. There will always be sadness. Even now, seven years out, I will sometimes cry when something reminds me of my mom, and even more so with my Dad, as his loss is more recent. But now I am remembering the happiness of our relationship, the way we enjoyed things, and those memories are more pleasant than sad.
Hope that makes some sort of sense. As you can tell from the other responses, a lot of us have shared this experience. Eventually you will come out on the other side, and you will find yourself remembering your father without quite as much pain, and you will get more pleasure out of the memories. Probably doesn't feel like that now, but it will happen. To your own time table. Don't let anyone tell you at, say, six months out 'you should be over it by now.' some people recover feeling normal early, others take several years. And even when you think you are mostly back to normal, you can suddenly be hit by a crying jag or other type of severe grief seemingly out of the blue. There is a reason why our ancestors expected and allowed for a mourning period of one to two years after someone lost a close member of their family. Sometimes I wish we still did that...