You’re mad, you’re boiling, you’re raging and this is most likely against something, more precisely someone.
But no. Actually, nobody is upsetting you.
Newsflash, it’s all “because of” YOU.
Your own little theater in your mind is upsetting yourself. You saw there a projection of the past and future situation, you built it and analysed it through your own filters. This projection and images you are creating of the past and future of the situation, of the person… the images that come to your mind. They’re just an illusion, they never actually existed. And if eventually they did, you’re biaised because you’re only seeing them now through your filter.
And that makes you madly upset. Against you.