Hello, completely different area of study, however my PhD was 3 years (with 9 months thesis pending after). The second year of my studies and part of the third were really lost, I went through something and it impacted my performance, I also started an amazing lit review only for someone to publish a flawless one a month after I'd collected data, then I had a study fail because of recruitment.
It wasn't easy, and I gave up on a social life but I managed to complete within the thesis pending period.
I'd look at what you realistically have to do, try to develop a plan or a GANNT chart so you can plan your progress. Take this to your supervisor and see if they agree it's workable. It's better to start this planning now and speak to them now rather than wait and find yourself losing even more time.
Do you have to resubmit for your progress review? I failed my progress review at the end of year 2 and had to resubmit for my progress review 4 months later?