"Nurses? Don't seem qualified to look after..."

I visited the hospital a few weeks ago. Before I attended my appointment the nurses took my bloods and blood pressure. It was extremely low and they did nothing but ask if I was ok? Then when I said 'no I feel dizzy' they said ok that's the low blood pressure, they then only told me to go sit in the waiting area and did nothing about it! Then they proceeded to talk about there home life loudly so loud that I heard one nurse offer another nurse a cup of tea? To which the other nurse replied 'no I can't have tea I have stomach problems Gastritis) Then another nurse offered the same nurse a cake, to which they happily said yes and ate? I don't understand how a Nurse cannot understand their own health situation enough not to make the right decisions openly in-front of public, how they can look after the out patients?