Hello, question asker!
It's tough to give advice on your obsessive thoughts about doubting your serious illness in just a short description of 200 words or so. But I'm still excited to chat with you in my answer and explore more possibilities with you when you're feeling troubled or even emotionally broken by this.
You are strong! Believe in yourself!
From your text, I can see that you once had symptoms of "shaking hands, dizziness, and lack of concentration" due to anxiety. You then took the initiative to help yourself by adopting the habit of exercising regularly and going to bed early, which helped alleviate the symptoms. Even now, after the symptoms of illness appeared, you actively sought help through the internet. This shows that you are a strong young woman with a positive outlook on life. This psychological drive to make yourself better will help you ultimately get out of trouble.
"The one who unlinks the bell must also link it again." You know yourself better than anyone, and you're the best person to help yourself!
It's time to face the source of your stress head-on!
You're currently in your third year of high school, which is an exciting time! In a year, you'll be taking the college entrance exam, which is a big step in your academic journey. As you navigate this exciting period, you may also face pressure from peer relationships or other sources. You mentioned that you were particularly anxious due to pressure before your third year of high school. What was the specific event or situation that caused you to feel this level of anxiety?
Also, what happened when your somatic symptoms first appeared, and under what circumstances will they reappear? Perhaps your anxiety is a bit generalized at the moment. These questions will help you see what is currently making you most anxious, and you can use this information to your advantage!
You can do this! If you can identify it and face it, you will gradually be able to cope better.
Make the most of the resources around you!
[Use the resources around you]
This is a very difficult time for you, but as you say, "My parents are also very helpful," and with their support you can release some of the pressure. At the same time, you are also worried about your friends, which shows that you have a close relationship with them.
Your family and friends are there for you! They can help you get out of trouble. When you feel worried or scared, be honest with them about your thoughts and feelings. Ask them to understand you and support you. If the physical symptoms caused by anxiety reappear and persist for a period of time, you can also ask them to accompany you to see the school psychologist or a professional doctor and counselor.
I'm rooting for the original poster to get out of this difficult situation and thrive!


Comments
I understand how overwhelming those feelings can be. It's great that you've already taken steps like morning jogging and adjusting your sleep schedule. Focusing on what you can control, like maintaining a healthy routine, might help to ease those fears over time.
It sounds like you're doing so much better now with the support of your parents and by making lifestyle changes. Maybe talking to someone, even if not a psychologist, like a trusted teacher or a counselor at school, could offer some comfort regarding your health concerns.
Sometimes our imagination can run wild with worstcase scenarios. Have you tried mindfulness or meditation? They can really ground you in the present moment and help manage those intrusive thoughts about potential illnesses.
Your progress is commendable. Perhaps keeping a journal of your symptoms and activities could show you patterns and triggers. Over time, this might help you see that minor symptoms don't necessarily mean something serious is happening.
It's good that you're aware of your tendency to magnify symptoms. Maybe setting up a system where you check in with yourself daily about your health worries and limit the time spent on these thoughts could be beneficial. This way, you give yourself permission to worry but also set boundaries.