I walkeds walking on the sidewalk and I was, looking for a store to buy a new broom.

Suddenly, I something hit my head.

I think this what you meant

Someone who parked his car on the sidewalk didwasn't wacthpaying attention and hit me with his door as I was passing by.

Just making it sound natural :)

It hurt me so bad, but fortunately it didn'tthere wasn't any bleeding.

This is how I would say it

The owner of the car geot out and check med if it (or I) was bleeding.

Past tense of "get" is "got"

I was in a hurry and as it didn't bled, I just gowent to the store.

The past tense is needed here.

When I arrived at home, my head was still hurting, and my sister who is a doctor, had a look at it.

It bumpehad a little protrusion and she told me to put a glass on it.

A "glass"? Do you mean "gauze"?

Today I was hit by the door of a caa car door.

I walkeds walking on the sidewalk and I was looking for a store to buy a new broom.

Someone who had parked his car on the sidewalk didwasn't wacthtching and hit me with his door as I was passing by.

It hurt me so bad, / It hurt a lot, but fortunately it didn't bleed.

The owner of the car geot out and check med if it was bleeding.

I was in a hurry and as it didn't bled I just gowent to the store.

When I arrived at home, my head still hurt, and my sister who is a doctor had a look at it.

It bumpedThere was a little bump and she told me to put a glassice on it.

Why do some people do not pay attention when they are using the public highwayroads.

I always make sure to not to hurt anyone, but it seems that ithis is not the same way for others.

Today I was hit by the door of a caa car door.

I walkeds walking on the sidewalk and I was looking for a store to buy a new broom.

Suddenly, I felt something hit my head.

Someone who had parked his car on the sidewalk didwasn't wacthtching and hit me with his door as I was passing by.

Alternatively, "was not paying attention" instead of "wasn't watching" would also feel more natural to me.

It hurt me so bad,ly, but fortunately itmy head didn't bleed.

"It" was a little vague in this sentence, best to repeat the subject (your head) again for clarity.

The owner of the car geot out and check med if itI was bleeding.

I was in a hurry and as it didI wasn't bleeding, I just gowent to the store.

It bumped a littleThere was a little bump on it and she told me to put a glass on it.

Why do some people do not pay attention when they are using the public highway.?

I always make sure to not to hurt anyone, but it seems that it is not the same way for othersothers don't do the same.