Time for the paper bag with the eyeholes. And whatever you do, don't go outside until it's dark. Avoid the presence of impressionable children so as not be responsible for years of therapy for them.
Or listen to everyone else here... which is Ming's advice.
Everyone has flat bits or bumpy bits on their skulls -- it's just that most skulls are covered by hair and you can't see them. Again, yours looks fine. If it was a true hemisphere then it would be truly unique.
As many of the fine members have said

it is what it is , be happy or get that paper bag

I truly hate paper bags
I sort of have the same shape. No one says anything...run it! Looks good man.
This will probably be repetition of what the other guys said, but I want to add my 45 cents.
I buzzed my head for about 4-5 years before shaving it bald. It was good preparation. There was little fuss between buzzed #1 or no guard to shaved bald. Some did not even notice.
You're young enough, you don't need to shave bald, but I'll tell you, if feels fantastic. It's an acceptable hairstyle for men these days. Lots of bald guys in my community, some by choice and some by nature.
Your current haircut look excellent. There's not 'issue' with the shave of your skull. You look handsome. Nothing to be embarrassed about. Keep up the buzz for now, and when you are ready, go ahead and shave your head.
Once you get the itch to shave your head, it won't go away until you do it. Hope you'll give it a try some day.
The shape of your head is fine. Dont worry about it.
Whatever happens..give us an update!
Did someone say something about the shape of your skull, or was it all on your own? Not that it matters, but I'm curious.
Thanks for the further comments.
My dad had mentioned that my skull had a dip in it after I buzzed it for the first time. I think that's a pretty common feature in terms of skull shapes, but I feel like mine is more pronounced than other people's. Then again, we're all our own worst critic.
So did you shave it? Let us know...post a couple of photos!