Is that right? Did you really say that?

For the second time in two days, someone has commented on my use of a parasol and an umbrella in the sun.
The first time was yesterday at my local post office. The person serving me noticed my parasol, which I had placed in front of him on the counter. He sarcastically said that it wasn't raining and I was being hopeful. 
So, I removed my hat, said that I  was bald and was on I.V. chemo. so I  needed to be extra careful in the sun. He was dumbstruck.
Today, after trying to buy my injection, for tomorrow, I  was walking to my car under an umbrella. The man walking behind me commented that it wasn't  raining. I turned around to him, took off my beanie and very calmly told him that I  was bald and had just had I.V. chemo. I really embarrassed him because he couldn't stop apologizing.
I also couldn't pick up my injection, ready for tomorrow, because the pharmacist had forgotten to order it. I have been getting it from the same pharmacy every month for the last two years. The pharmacist tried to make me feel better by offering me a cheap calendar which I  politely refused.
I had to make another appointment with my G.P. for tomorrow which means I miss out on doing my exercise class.
Not happy!