Could my headache symptoms be serious?

Bedwetting, also called nighttime enuresis, happens when urine is released during sleep. It can be caused by factors like a small bladder, deep sleep, or stress. While it's common in kids, some adults experience it too. To help, limit fluids before bed, use the bathroom before sleeping, and try a bathroom alarm. If it continues, consult a doctor for more solutions.

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Maybe your friend will be feeling that she/he is very sleepy, very dizzy, or may lose consciousness. This occurs because the body is overwhelmed by the drug. It is crucial to take the right steps immediately and calling emergency services is an important one. They will give the needed treatment so that your friend can heal. 

This sounds like the symptoms of a condition called postural orthostatic syndrome (POTS). POTS can make you feel dizzy, lightheaded, or faint when you stand up. It can also cause your vision to blur when standing up, heat intolerance, and nausea upon standing up. Vyvanse could worsen these symptoms. Drinking lots of fluids and adding more salt to your diet might help. Talk to your doctor about this.

I see that you have a tight band headache around your head and feel like vomiting because of anxiety and stress as well. These signs might mean that you have a tension-type headache; typically caused by bad posture at work or eyestrain from looking at computer screens all day long. You could take some painkillers such as paracetamol or ibuprofen to help relieve the pain in your head. Moreover try and calm down by breathing deeply plus drink lots of water. If this feeling doesn’t go away please go see a doctor so they can check it out.

You're having trouble sleeping. Not getting enough sleep can make one feel tired and grumpy. Common causes of this can be stress, drinking caffeine before bed, or staring at screens late at night. Try to calm down at night by reading a book or having a hot bath. Avoid caffeine as well as screens. If the problem persists, you may want to seek a professional for advice. 

As your symptoms indicate, you may be suffering from a migraine or tension headache. But one should not exclude the possibility of serious conditions. I suggest consulting a neurologist for further detailed diagnosis. While you wait, work on reducing your stress and have a good sleep at night. Recall that your health should be considered first and you might need medical attention if the situation requires so.