I am palpitating- is this sentence correct?
Yes, the sentence, 'I am palpitating,' is gramatically
correct.
For example:
A doctor might say, 'I am palpitating. I'll begin with your
abdomen; please tell me if you feel discomfort.'
You might say, 'I am palpitating my stomach, and I think I feel
distension,'
If you were speaking, though, of feelings of palpitation in
yourself, you'd say, 'My heart is palpitating,'
Speaking of another person or creature, you might say, 'I can't
smell anything, but my dog's nostrils are palpitating.' or, 'He
looks as though his heart's palpitating.'