Feeling a bit horrible!

Yesterday was the last day of my fertile window and I had a 8% chance of pregnancy. We've got a 2 year old son and I still don't feel ready for a second one. We decided I'd get the morning after pill. 

So after I finished work I went to the pharmacy and asked the lady "I'm a bit embarrassed but do you sell the morning after pill?" I tried to talk as gentle and soft as I could but i think the people next to me listened and were looking at me. Then the pharmacist took me to a room to ask me a few questions and explain to me how the pill works and when I left the same people were still there and were looking at me disgusted. My partner wasn't there, I was with my son and they were looking at me as in "omg she's got a son and probably fucked someone else. That kid shouldn't be with her." I feel quite horrible. I even told the pharmacist I'm due to get married and we always use condom but this time it broke and we aren't ready to get pregnant again and he understood. I just have this guilty, horrible feeling. Thoughts?