January results will be coming out in just over a week, so I suggest you try to stop worrying about it for now as you can't do anything to change your January results. You may have been underpredicted by your teachers and if you have then your results will show this and you'll know you're on track for the grades you need, and everything will be fine. Otherwise, request your exam papers back and ask your teachers to look over what you're doing wrong, then work out what you did badly on and how you can improve on this, and apply this to your second units too. Then in June you can do resits + June exams and hopefully come out with better grades, and if not you may need to consider applying to some unis with lower grade requirements as back-ups or maybe having a 3rd year at college to resit exams.