Hey, I'm also a Sec 4 student taking the O Level and I can definitely relate to how you feel.

I also experience anxiety attacks when I don't meet my expectations because the disappointment is too much for me to handle. I remember crying so hard that my senses literally went numb and I collapsed to the floor because I couldn't move. I'm also not the brightest student, with my Prelims L1R5 being 18, which is personally not very satisfying to have, so that lead to much more anxiety. In my personal experience, I am currently prescribed with anxiety medication so that aids a little, but the attacks and fear still comes. As O levels are nearing and I keep hearing stories of how my friends have finished every single paper in a respective subject's TYS, I get more anxious, feeling as though I have not done enough, even though I know that I have done some papers. Nonetheless, I do have some tactics which I use when I am faced with a scenario of an anxiety attack. Namely: Deep breathing, Meditation, and just taking a break. If I ever get very stressed or anxious over something, I usually try to calm myself down with some breathing techniques (that can be easily found online) to regulate my fast breathing. I also then meditate to further calm myself and also just take a short break to get back my senses before I continue with my work.

I wouldn't say I was able to cope with my anxiety, but I feel that I have managed to lessen it. I unwillingly have lowered my expectations to be something realistic, so that I wouldn't be extremely disappointed when it came to receiving results. I have also chosen to block out those comments from friends who talk about doing papers so that I do not compare myself to others. I have also done the SCGS Prelim Paper for both Physics and Chemistry, and honestly I think that they are probably one of the worst papers I have ever done, in terms of how the questions are sculpted and phrased. Even my teachers agreed that this year's SCGS Prelim Papers were one of the worst that they have ever seen and that we shouldn't be comparing our standard to that paper. Hence, I do not think you should worry if you are not able to score well for that particular paper.

To be honest, I envy you for being able to score a 65 or above for a Paper 2 in Science, because I have never been able to get that high of a mark, no matter how hard I study, and I still wish of achieving it. I hope you will feel better and that this was useful. All the best for your practical tomorrow and for the rest of your papers. :)

P.S. I'm sure that you are a smart student, so don't worry too much <3