Look, no one can really say if you are going to get in. I'm sure you are aware of the people with high ATARs/UCAT scores who don't make it in because of the interview. With this unknown factor, it is impossible to be certain with the outcome. That being said, you can still achieve high scores going to a disadvantaged school, especially if you get a high exam mark. You're halfway through the year - don't give up now! Yes, if your cohort performs worse on the exam then your scores will scale down unless you are rank 1/ranked relatively high. It's no use worrying about things you simply cannot control. I recommend that you focus on what you can control - the amount of effort you put in now and in the future. There is still ~2 weeks till the UCAT testing period to start, so start practising now if you haven't already. If you feel you aren't disciplined enough to achieve the scores you want to achieve - work towards improving that. Don't worry about facing challenges as a doctor - focus on getting through now. It's like being in year 3 and looking at the maths you do in year 10 - you'll think it's impossible and worry at how you will be able to do that in the future. When you get to year 10, the maths doesn't seem so difficult after all. It's the same thing here. Looking at the things doctors have to do and face may be daunting now, but once you get to that stage, you will have the necessary experience and skillset to deal with it.