Felt or Fell - ( pro ty co by eventuelně to pletli jako já :-) ) felt: past tense and past participle of the verb 'to feel'
I felt better after I had a good dinner.
Never in their life had they felt so happy.
fell: past tense of the verb 'to fall'
Mike fell from a tree and hurt his leg.
A bomb fell on the church and destroyed it.