Not quite.

Well, I'm off!

Means that you're leaving. See: TheFreeDictionary - I'm off.

This song sounds/feels a little off.

Means that there is something not quite right about this song to you. It feels weird. A thread on ELU about that: What does the idiom “to sound a little off” mean?

If you wanna say you're not feeling well, you could say:

I'm feeling a bit under the weather, I think I'm going to go home.

Not quite.

Well, I'm off!

Means that you're leaving. See: TheFreeDictionary - I'm off.

This song sounds/feels a little off.

Means that there is something not quite right about this song to you. It feels weird. A thread on ELU about that: What does the idiom “to sound a little off” mean?

If you wanna say you're not feeling well, you could say:

I'm feeling a bit under the weather, I think I'm going to go home.

Not quite.

Well, I'm off!

Means that you're leaving. See: TheFreeDictionary - I'm off.

This song feels a little off.

Means that there is something not quite right about this song to you. It feels weird. A thread on ELU about that: What does the idiom “to sound a little off” mean?

If you wanna say you're not feeling well, you could say:

I'm feeling a bit under the weather, I think I'm going to go home.

Not quite.

Well, I'm off!

Means that you're leaving. See: TheFreeDictionary - I'm off.

This song sounds/feels a little off.

Means that there is something not quite right about this song to you. It feels weird. A thread on ELU about that: What does the idiom “to sound a little off” mean?

If you wanna say you're not feeling well, you could say:

I'm feeling a bit under the weather, I think I'm going to go home.