Is it normal to think this nurse was being overly friendly?

I had the flu and went to my doctor and he said a nurse was going to come in after he left to see another patient and after a few minutes she came in wearing a dark blue t-shirt with a mask on her face and said she was going to stick a cotton swab in my nose to check for the flu virus and it was just going tickle a little. I'm 19 and she was probably around her mid to late twenties, she looked really good with dirty blonde hair down to her shoulder and the mask made her eyes just pop, it was a sparkly blue. Not going to lie but her tight shirt made her chest area look really nice and big. So then she said she would back in a few minutes and she came back and asked me to follow her into the next room, where there was another nurse who wanted to take a blood sample for testing, but the other nurse said she would come to my room so I sat back down. And then the doctor came in later and gave me some medicine and said I had the flu and one for coughing too, as I was leaving the nurse was standing outside my door and I felt kinda awkward but she just smiled and told me to "feel better". So after that when I was making my next appointment with the person at the front counter I saw the nurse standing near the weight machine in front of the room I came out of, she was standing there all the time watching me until I left. There were other people sitting in the waiting area and she didn't even seem to see them at all.