At your age you have so much potential that you can change many things ,you just need to realise it ,this is the time which you should utilise at its fullest ,In this period your approach towards life will decide your future, you can make your future so bright from here. Don't allow your emotions ,anxiety ,laziness, such that it effects your work, your life. Everything is within you. The power lies within you only .we get effected from our surroundings, our laziness ,lack of concentration and slowly develop our mentality like this. Its you and only you who can control all this. Just give your 100% so that you don't feel regret that you have not done your best. Everyone has to give that amount of hard work to succeed and now its your choice whether you want to do it in 1 year or 2 3 years or will compromise with situation. At present you are willing to do it then do give your 100%.always focus on your goal. Divide your studies in part wise.In this you can take help of any counsellor. If you need my help you can contact me online
also. At present you should focus only on your exam ,you will get so much time to deal with many issues after exam. Nothing will change but the exam time will pass .if you will continue like this then you will not able to give your best. Just focus on your studies and say to yourself always that I will deal with it after my exams. Its like when we go for any trip then we forget everything and for sometime we just enjoy the moment. So think like same way that you are on holiday from everything ,every thoughts and will deal this after your exam.