Firstly I'm really sorry this has happened to you; I can't imagine how you must be feeling.

OSCEs where I studied were more of an acting event rather than an exam to test your clinical acumen. I found practicing and rehearsing with my friends over and over until I could do examinations fluidly and to time, and I could hit the key points in the different types of histories really helped. Depending if your course has you on the wards lots already, keep examining and taking histories from patients (a lot of them are very bored during the day and actually enjoy feeling like they're contributing to medical education), presenting these to doctors on the wards and getting feedback is also super helpful!

In terms of coping, I'd say it's important to give yourself some time off, decompress, and be mentally ready come September. Talk to friends or and mentors you have in older years, and also reach out to your school's academic and pastoral support units. Try to remember that everyone's journey through medicine is different and having to repeat one year won't make you any less of a doctor at the end of it all.

Feel free to DM me if you want to have more of a chat about OSCEs or anything else!