Brain Teaser: I am something, a lot of people don't like me as a friend including u. But i'm?

... called upon anytime one is injured. I like playing wit pregnant women, im a 5 letter word if my last letter is put b4 my 1st letter, i become a n

... called upon anytime one is injured. I like playing wit pregnant women, i'm a 5 letter word if my last letter is put b4 my 1st letter, i become a name of a country.
Who am I?

or:... called upon anytime one is injured. I like playing wit pregnant women, i'm a 5 letter word if my last letter is put b4 my 1st letter, i become a name of a country.Who am I?


or:pains for d country that Spain

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