Why is there uneasiness?

Today I feel rather uneasy. The morning started alright. I got to work on time today (after 3 weeks of being late). Things were cool until several of our colleagues from elsewhere came into our department for snacks and to catch up with one another. The sudden surge of noise and activity level unrattled me.

Similarly yesterday at dinner time, several of my siblings dropped by just as we were going to have our dinner. My brother who was staying with us was joining us for dinner. Two sisters and a brother-in-law came by to pass him some stuff (they were having dinner elsewhere). By the time we settled down at the dinner table, we had 3 guests watching us eat and yarning at the same time. Noise level was up because my sisters tend to talk a bit loud.

From feeling relaxed after gardening, I became a bit tense. Of course, no one noticed it. When every one left later on and I was getting the kids to shower, I noticed that I was getting more tense. My youngest boy started to whine and it annoyed me.

Why am I so affected by what goes on around me? It is always the same thing. It is like I am swarmed by people and my energy level just drops and I lose myself. Why is it so difficult to stay present and aware so that I remain calm?