Is AUTHOR wrong in the post ? POST : This might seem petty, and actually in hindsight, it definitely is, but let me explain...
My gf had plans to move a wardrobe from the spare room into the main bedroom, which I knew about beforehand, and I got up early to empty the wardrobe out and throw away some of the boxes it was hiding so we could move it together later in the day.
I then went out to see captain marvel with my dad and when I got back she'd half-moved around the spare room, the bedroom and the living room without telling me any of her plans. I was then expected to finish what she started while she went out to eat, which I did, but it caused many, many complications and inconveniences - not to her, just me - chiefest of which was that the play area I had set up for the PSVR i bought myself for my birthday last month was no more, and i had to try and set up a new one around her plans for the living room, which in the end I was unsuccessful in doing and have had to give it up entirely, unfortunately.
I then confronted her and we had one of very few arguments. Typically i will raise something that has upset me once every 4-5 months and it will usually turn into a massive argument usually ended by me apologising for getting worked up.
I'm willing to put up with a lot of inconvenience or avoid giving my input so she can be happy as she deals with severe OCD (let me just point out that she wasnt moving the apartment due to her OCD as it doesn't strike her like that) and bipolar which require her to live a life of constant inconvenience, so I'm used to not coming first in decisions, and happy to live in second place as long as she can be happy.
But today was just one of those days, shed completely cut me out of any decision-making in our home and I was hurt that she didnt spare a thought for me when she was placing my belongings in an ottoman and putting it under a TV, or obliterating the VR playspace I painstakingly and precisely set up, or just leaving me to do all the work. 
So anyway, I lost my cool and shouted at her. There was no violence involved, I didnt insult her or hit her or anything insane like that. But I raised my voice because I was angry. 
She did her usual tactic of invalidating my anger, saying things like "you're just stressed with work and are taking it out on me" (since getting my new job I have never been happier or more carefree) or "you're just frustrated because you wasted your time helping me out and you have freelance work to do tonight" (the work hasn't been confirmed and I'm certainly not upset that I spent the time helping her out), etc, things to that effect.
At that point I got more annoyed because I felt like I didnt have the right to be angry about something, as she essentially insisted I'm angry about something else and am just latching onto this event as an excuse to take it out on her. It just feels unfair that I'm not "allowed" to shout in anger when I feel I've been wronged.

What do you think? Am I just a petty asshole or am I right to be upset?