Uni- high turn it in percentage

Hi, so for context I’m a second year criminology undergrad student. I’m finding this year particularly challenging partly because this year is academically challenging but also due to mental health struggles and caring responsibilities at home. I haven’t attended uni much at all this semester and my grades have plummeted since first year. so basically I uploaded an assignment today which was a visual essay (power point with the essay in the notes) ( I had to force myself to do it as my mental health has been so bad lately). Turn it in has marked 35% similarity. I am literally driving my self crazy and I can’t stop panicking about it. Chances are that I have missed a few references and citations due to being in a very challenging home life environment and not having a quiet working space. Then, I realised that I had uploaded an incomplete essay from last week, missing many references. There was an option to reattempt so I was able to email the tutor and uploaded my more recent attempt. But I’m literally panicking due to the 35 percent turn it in. It’s never been so high before and I am so scared of the consequences if I have stupidly made referencing errors. I just feel like I’m not in the right mindset to complete uni work and when I upload it I can’t stop panicking about it, fearing I have failed or worse I have plagiarised. I’m also worrying if the tutor will allow me to use the second submission as the first is definitely missing citations. Honestly, do I just drop out of uni at this point, I feel to dumb to carry on and it’s mentally draining me. I want to continue but part of me is ready to give up.