My whole week of no negativity

After reading a full book about positivity , I was determined to be a calm and positive person ."No one's hurtful behaviour can make me angry now "I said this in my head and took a deep breath while meditating .
After 2 days of no anger and gossip, I started thinking of myself as some mystic. I started to regularly quote Rumi in my conversations and my instagram posts about positivity and calmness of mind increased.
After a week of no negative talk about people I hate ( well almost no negative talk ), I was now a happy Buddha .Now I was sure( well almost) that I had overcome all the bitterness in me as last night i forgave all of my enemies (almost all )and sent love to them and how can I forget to mention that I even praised my colleague with perfect hair that how gorgeous she looks ( to be honest , it was quite difficult )
All was going well , I was even thinking of becoming a motivational speaker but suddenly demons in me were recalled by someone and I just uttered my first negative sentence in a week.
What happened was we ( me and my husband ) were invited to a dinner where host had also invited some other couples and there was a woman there who was constantly bragging about her medical degree ,how big her house is ,how easily she got her first job and how rich her husband is.First I was using my positivity mantra with her but than she got on my nerves and finally when she asked me why I am carrying such an old fashioned clutch , it was enough for me and it made me say my first negative sentence in a week
"Well it is not as old fashioned as your face , and than I gave her a very good reality check ( I can't mention the whole dose I gave her ), all I remember after taking medication , she was no where to be found near me .
After coming home , first thing I posted on my Instagram was "stop being ultra positive all the times , give some people dose of their own medicine ".