i feel so lost

i genuinely feel so lost. i only properly started studying like last week and i genuinely feel so stressed like i’ve thrown up twice today from stress over this leaving cert. i genuinely feel like nothing is going in like i use active recall or 25m/5m break and nothing works. my course is only 260 points but i’m at the point i feel like i won’t even get that, let alone the realistic 350 that i’d need. i feel so useless because of this stupid fucking leaving cert