1. I advise you to be very careful with your head. Your head is the core of your body. If you ever feel dizzy or just feel off after receiving a shock to your head, please stop playing and tell a medical professional as soon as you can. It could be a concussion, which requires a lot of rest for recovery.
Don't push through: take care of your health, mental and physical before anything. Taking care of yourself is more important that winning the game. To do that, you should develop a growth mindset, seeing every action of yours as a step towards developing an improved version of yourself. You cannot grow if you don't take care of your body.
2. Do you sometimes push through even when you are not feeling well? Can you describe the particular scenarios in which you do that?
Do you enjoy the sport you are doing, or does it feel more like an obligation?