Caught Up In Vs Caught Up With ?

too finicky 7

Could anyone explain me the difference between "caught up with" and "caught up in"? We don't use "explain me" in English. Just say "explain".

1. I am sorry, I am late, I got caught up with work.

I am sorry, I am late, I got caught up in work.

2. I was caught up with work.

I was caught up in work.

There is no difference intended in meaning between 'with' and 'in' in the sentences in 1 and 2. Personally I would use 'in'. I use 'catch up with' in other contexts.

3. I am so much caught up with work.

I am so much caught up in work.

The sentences in 3 are unnatural.

Thanks

CJ

I am caught up on (with) my work. = I have finished all the tasks that needed to be done.

Definition: to do the work that one should have done.

I need a quiet time so I can catch up on my work.
He started school late and now has to catch up.

I am caught up in my work. = I am so busy doing my tasks that I have no time for anything else

Definition: To be involved or mired in something.

 I refuse to get caught up in another one of your stupid schemes.