When I went to the grave during the Qingming Festival, I took a big drag on a paper-burning cigarette. I felt dizzy, had a headache, and had chest tightness. Later, I found that my singing voice had changed. It was breathless and hoarse. I studied music.

Based on your description, you may have inhaled a large amount of smoke, which may cause some physical discomfort and affect your voice. Here are some suggestions:

1. If you feel unwell, get as much rest as possible and avoid overusing your voice. Try to keep the indoor air fresh, drink more water, and eat some lung-moistening foods, such as pears, honey, etc.

2. If you have problems with your voice, you can try vocal cord training or professional vocal training to help restore your voice. At the same time, you should also pay attention to protecting your throat and avoid overuse and consumption of irritating foods.

3. When performing similar activities in the future, please pay attention to safety and try to avoid inhaling too much smoke. If you feel unwell or have unusual symptoms, it is recommended to seek medical advice promptly.

4. As a music student, you should know how to use your voice correctly and protect your vocal cords. It is recommended that you focus on correct vocal techniques and practice methods during learning and performance.

In short, if you have physical discomfort or voice problems, don’t be too nervous and anxious. Take timely measures to protect your throat and body and avoid overuse and consumption of irritating foods. If symptoms persist or worsen, it is recommended to seek medical treatment promptly.