Hvis mit pandehår bliver ved med at falde ned i øjnene, får jeg det klippet endnu kortere næste gang.

Because pandehår is grammatically neuter in Danish: et pandehår.
For neuter nouns, my is mit, not min.

This is also a good word to notice because Danish treats pandehår as a singular noun, even though American English often uses the plural bangs. So Danish says mit pandehår, not a plural form.

Pandehår means the hair at the front of the head that hangs over the forehead:

• British English: fringe
• American English: bangs

So mit pandehår means my fringe / my bangs.

Bliver ved med at is a fixed expression meaning keep doing something or continue to do something.

So:

• bliver ved med at falde = keeps falling
• Hvis mit pandehår bliver ved med at falde... = If my fringe keeps falling...

Here, bliver does not mean becomes in the usual literal sense. The whole phrase functions as one expression.

Because the pattern is:

blive ved med at + infinitive

So you get:

• bliver ved med at falde
• bliver ved med at snakke
• bliver ved med at glemme det

English often uses keep + -ing, but Danish uses at + infinitive after this expression.

Here it means that the hair is falling down into the eyes or hanging in front of the eyes.

ned adds the idea of downward movement, which makes sense with hair. So:

• falde ned i øjnene = fall down into the eyes

This is worth noticing because falde i øjnene without ned can also be an idiom meaning stand out or be noticeable. In this sentence, though, the meaning is literal because we are talking about hair.

Danish often uses the definite form of body parts when it is already obvious whose body is being talked about.

So:

• falde ned i øjnene literally uses the eyes
• but in English we naturally say into my eyes

Because the owner is obvious from the context, Danish does not need mine here.

You can say i mine øjne, but that would usually add emphasis or contrast. In this sentence, i øjnene is the most natural choice.

This is because of normal Danish main-clause word order.

When the Hvis clause comes first, it takes the first position in the sentence. In the main clause, the finite verb must then come before the subject:

• Hvis ..., får jeg ...

This is the usual verb-second pattern in Danish.

So the structure is:

• Hvis mit pandehår bliver ved med at falde ned i øjnene = subordinate clause first
• får jeg det klippet endnu kortere næste gang = main clause, with the verb får before jeg

This is a very common Danish construction:

få + object + past participle

It means have/get something done.

So:

• jeg får det klippet = I get/have it cut
• jeg får bilen repareret = I get the car repaired
• jeg fik håret farvet = I had my hair dyed

It does not necessarily mean that the speaker cuts it themselves. It usually means they arrange for it to be done, for example by a hairdresser.

Det refers back to mit pandehår.

Since pandehår is a neuter singular noun, the pronoun used for it is det.

So:

• mit pandehår → det

The sentence avoids repeating the noun:

• får jeg det klippet instead of
• får jeg mit pandehår klippet

Both are possible, but the version with det is smoother and more natural here.

Kortere means shorter.
Endnu kortere means even shorter or shorter still.

So the sentence implies:

• the fringe is already at some short length
• next time, it will be cut to an even shorter length

Compare:

• kortere = shorter
• endnu kortere = even shorter

Because Danish often uses the present tense for future meaning when the context already makes the time clear.

Here the future meaning is clear from:

• the conditional structure Hvis ...
• the time expression næste gang

So får jeg det klippet næste gang naturally means I’ll get it cut next time.

Danish does have ways to mark the future more explicitly, but in sentences like this, the present tense is completely normal and often the most natural choice.