fell/feel..........ill/sick

[viet_ghat]

I fell sick
I fell ill
I feel sick
I feel ill


What is the difference in meaning between these sentences? Or When do I say these sentences?

[engee30]

I fell sick
I fell ill
I feel sick
I feel ill


What is the difference in meaning between these sentences? Or When do I say these sentences?

I fell sick/ill means I became infected with an illness
I feel sick/ill means I feel so bad that I am almost going to vomit