в таких ситуациях:

Recently, I have been feeling tired.
Recently, I'm feeling tired.

I've been feeling tired today.
I'm feeling tired today.

I've been feeling tired all the time.
I'm feeling tired all the time.

I'm always tired.

I've been tired all day.

I would tend more to pair 'feel' with 'sleepy' rather than tired and would 'be tired'

With specific regard to PC: I'm feeling sleepy today
versus PPC: I've been feeling sleepy all day.

It's the kind of thing that's difficult to explain, it's mostly intuition.

Read example sentences and then decide which of the rules presented below is false.

PRESENT PERFECT
I have written the report.
I have lived in Paris for 25 years.
Chloe has drunk 3 cups of coffee this evening.

PRESENT PERFECT CONTINUOUS

I have been writing the report.
I have been waiting for you for 20 minutes.
Chloe has been drinking coffee this evening and she can’t fall asleep.

RULE 1:

We use the present perfect continuous when we are more interested in the activity itself and the present
perfect when the results are more important to us than the activity.

RULE 2:

Only the present perfect continuous can be used for activities which are still happening.

RULE 3:

We can use the present perfect continuous for activities which have recently stopped.

RULE 4:

When we want to say about the quantity (how much / how many) we use the present perfect simple.
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