My Girlfriend (24/f) pushed me (21/m) into a wardrobe and refused to let me leave. (Almost 1 year relationship)

I have been with her for just under a year. A few days ago we had an argument because I was in a bad mood because I couldn't walk on my leg properly as I had injured it due to my physically demanding job. I tried to make up for it by offering to go to the store, getting us some snacks to watch a movie later. I even said she could pick out a plant because she really likes them and she blew up at me because she had been asking me to buy her flowers for ages and now I'm offering her some in order to "bribe" her.
She went to the bedroom and I fell asleep at the kitchen table (I work from 12 to 9pm) because I was so tired. I went to bed and the next morning was getting ready for work again at 10am. As I'm about to leave she asks if I will say anything to her, and I said I don't want to argue before going to work. She then proceeds to ask me why I don't make an effort on her anymore because I never buy her flowers. I think I do make an effort.. I spend around 700 on her birthday a few weeks ago, I buy groceries and try to take her out when I have money.
I tried to leave and put my shoes on but she went behind me, pushed me away from the door into the wardrobe and snatched my trainer out of my hands. She honestly looked unhinged and I just stood there shocked, she knows my family were abusive towards me and then can so easily shove me like that. I just calmly asked for my shoes back, whilst trying not to cry and she just said "take them back from my hands, then we'll both be scared".
I didn't go near her and she just drops the shoe and goes to the bed crying. I hugged her and calmed her down then went to work.
Last night was the same story, I was completely drained from work. crawled into bed after buying more groceries for her and being in the kitchen talking for a bit. I was half falling asleep when she said my name and then "you don't want to talk?". She then proceeds to have the same conversation about how I don't make effort and literally bullet points how **** I am.
I snapped a bit and said how can someone you love just sit there and count off all the things that are so **** about you? She then went on a 10 minute rant about how unhappy she is and how I don't make any effort. She went to work this morning and it's my day off. I want to leave her but I'm scared.
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TL;DR - my girlfriend pushed me and I'm scared of how far this will go, how do I leave safely?


Source.