Stuck in grumpy mode? There's probably something going on underneath

For the past few days I’ve been really shitty, and despite my best efforts to shake it, I keep reverting to a state best described as the angry love child of Grumpy Smurf and Oscar the Grouch. I’ve found myself replaying old arguments in my head and scripting shouty comebacks. I sent off a series of terse emails. And yesterday on the train, the sound of someone constantly rustling a plastic bag annoyed me so much I had to get up and change seats. (I was also tempted to shout at her for using plastic bags, which is surely the greater crime, no?)
All this irritation had no obvious cause, but it went on for days and I suspected something else was going on internally.
My body was giving me signals that it was experiencing irritation at a deep level. My jaw became tight and painful (this is one part of the body where we hold on to anger), my digestion went out of whack (something which is usually, but not always, associated with emotional stress) and I developed hay fever (which is all about irritation)*.
Anger and irritation are perfectly valid emotions, and me experiencing them is not a problem in and of itself. The issue for me was that they weren’t prompted by a specific event or experience, and they were lingering like out-of-town relatives after Boxing Day. I knew that this was something that needed to be investigated.
When I thought about what is really frustrating me at the moment, I instantly felt that sensation in my gut that I get when I know I’ve identified something significant. There’s the fact I have to move out of my house, which is going to be an exhausting process that will cost me money I don’t have right now (and am worried that I won’t find, despite the angels’ reassurances to the contrary). There’s also the fact that my business is taking a long time to get off the ground. The experience of sitting in an empty room with an empty diary and waiting for the phone to ring is somewhat soul-destroying. 
It wasn’t hard to see the common thread: fear. Namely, fear of failure and fear of not having enough (money, resources, time). So many metaphysical books say that everything comes back to fear. In fact, anger is often referred to as a secondary emotion because it is usually masking another emotion. And often, that emotion is anchored in fear. 
Recognising my fears and calling them out for playing saboteur on my physical health hasn’t made me any less annoyed, but at least I’m aware of what’s really going on – and that’s helping me to put my focus back on what will help me move forward: patience. Accepting that my life is unfolding exactly as it should, and being patient with that process, makes me feel more calm. I hope that that will translate to patience across the board, making me less inclined to react to surface-level irritations. That’s the theory, anyway. 
I can’t, however, make any guarantees regarding the safety of plastic bag rustlers. 

* For the record, this doesn’t mean that if you sneeze you’re afraid of something – it probably just means you should stay away from pollen (lol). Also, sometimes a bad mood is just a bad mood. What I’ve documented here was just my experience of a lot of physical symptoms and emotional triggers adding up to the same thing.