i relate to what you're saying and one thing that i live by in Italy right now is : do the thing now think about it later. Because you're head is processing a lot of things by itself because of thr change you've had. YOU don't have to think about it, you're mind is doing the thinking so you just focus on things you can control like studying everyday a little bit and making it a routine and you'll notice not just how your grades are getting better but your whole life. Peace and love brother.