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When you lay on your chest and it feels hard to get air in, that could be from anxiety. Anxiety also makes it difficult for people to sleep well at night.  You can learn how to control your breathing when talking about it with them and other ways of calming down too if they know about it. Try doing things before going to bed like making a routine so that every time before sleep you will make sure that you get into bed more easily also practice good habits around sleep like not watching any screens an hour before bedtime because they keep awake longer which means fewer hours spent resting. If these symptoms stay or get worse then maybe it's time to see the doctor and tell them what’s been happening.

Teenagers often may not like some kinds of studying because it seems they have no interest in some subjects. It's similar to our emotions can be weakened or lost by outside forces such as being overwhelmed, demotivated, or distracted. Forgetting what you have learned can indicate that you are stressed or overwhelmed with many things in your head. You need to find time to unwind, practice self-discipline, and communicate your needs to someone if this happens to you. Appreciate that being involved in your studies is important but take time to relax and take care of yourself by knowing that it's okay to need help from others whenever you are in trouble.

It is critical to know the underpinning of your lack of sleep. Sleep loss can be caused by factors such as stress, anxiety, depression, and medical conditions. It is recommended you see a psychiatrist to identify and eliminate the sleeping problem's primary reason.

Hallucinations can be a sign of many underlying conditions I suggest that you go to psychologist as soon as possible in order to find out the cause of your hallucinations. You need to give thorough medical history to the doctor in order to help with the diagnosis. Do not medicate yourself. Instead, seek professional help.
 

The fear or anxiety related to time or the passage of time can make it challenging to focus on studying and other tasks. To cope up., break your study sessions into smaller, clear goals, set a regular study schedule, and use time management techniques. Practice relaxation and limit distractions.

I suggest making an appointment with either a psychiatrist that specializes in anxiety and mood disorders. They can assist you in the creation of a plan to control symptoms and maintain positive mental health.

You sound depressed. Stress can spin up in many ways which include but are not limited to headaches, insomnia, or upset stomach. A potential cause of this health hazard could also be the compulsion of life or extreme pressure at school. Get relaxed by trying different relaxation techniques such as calming, breathing, going around your building, and hanging out with a friend. Unessential as it may seem, these facts with such relevance as eating good food, doing exercise, and sleeping enough are also quite important.