this is a huge question. I try to explain it simply so that you can stop ask questions like that. From the question, I can figure that you are a young guy. You may have a busy time recently, all the things seem out of control. It's a problem everyone can meet, so first thing is relax yourself. It's not a big problem. Then, you should put all the things in an order as their weightiness. Start from the easiest things, it can help you building your confidence. I hope it can help.