Angry or not??

I tried to explain to my husband (of 38 years) the other day why, as had been said, I was always so grumpy. The female two doors down whose barking rats...chihuahua and shitzu...get left in an enclosed courtyard for yours on end drive me ape s..t. The old fool over the road why spends his day with a leaf blower blowing leaves first up then down the road. Aforementioned leaves then eventually get blown onto an enormous heap, about chest height around a tree in his front yard. They're never disposed of, just rearranged as they blow free, day after day after day. I said it was as if I was a glass, which in the past was only partially full. If someone (the dog owner or the leaf blower fanatic), behaved thus, it was like adding a teaspoon of water into the glass....there was still room for that 5ml and the glass didn't overflow. I had the capacity to absorb it. Now, however, with all the trauma, worry, angst, anger, sleeplessless, the joys and delights of 12 weeks of AC and now week 9 into the Paclitaxel and Herceptin cocktail...and the bilateral mastectomy with full node clearance ever closer on the horizon...well my glass is now full. The meniscus is bulging. Some twit comes and drops in 1ml, never mind 5ml...sets the water overflowing and I turn into a drooling idiot. I just lose my mind (what's left of it), and my language is appalling!! I'm not even sure if it is anatomically possible for these miscreants to do what I rage that they should!! Eventually I calm down, but gee whizz why indeed am I so grumpy? Why the heck not?