“What's wrong with me?”

I suggest that you get a thorough physical exam, with bloodwork, to rule out physiological causes. Then, since your symptoms may well be psychosocial in nature, consult a psychologist, get an assessment, and, if indicated, get into therapy to treat what comes out of the assessment.
I hope this is helpful.

Hello Madam, 

Hope that you have consulted your PCP and a licensed psychologist, a psychiatrist and a neurologist to help you find what is wrong and encouraged you to find solutions that are healthy and beneficial for you. 
Take care and remain safe. 

Dr. Lata Sonpal

It might be hyponatremia. See your PCP right away or ER.

The last 6 months have been incredibly stressful and most likely it is catching up with you. This can also affect our insulin and blood sugar levels which could be contributing to the thirst, appetite and feeling sleepy. However, it could all be just due to stress. Stress causes our hormones to imbalance, how our body utilizes nutrients, electrolytes, water, dampens our immune system, robs our muscle tissue of needed energy, breaks down muscle tissue causing weakness, sleep disturbances, fatigue. Some good adrenal support herbs include astragalus, rhodiola and holy basil. Taking some time out of each day to reduce stress such as meditation, yoga, walking, taking time for things you enjoy. You may see a doctor to check your hormone balance, blood sugar levels, and stress response.

Always thirsty is a red flag. Have you spoken to your PCP and told her that? This might be a sign of blood sugar problems. Call ASAP and get a full physical. If everything is okay physically, also tell her about your moods swings. I would need a full assessment (both physical and emotional) before I could answer your question, “What’s wrong with me?” There could be hormonal or thyroid problems, blood sugar, and an assessment of the stressors and/or changes in your life before I could answer that.

Take care of yourself,

Nancy J. Warren, PhD

I would suggest finding two resources. One would be a good family doctor or internist who could make sure that you are not suffering from medical problems. Second would be finding a therapist who could listen to what is really happening to you and assess the different areas of your life that could be affecting you. I would be wary if you consult a psychiatrist - many of whom would talk to you briefly and then give you medication. Above all, you need an in-depth assessment of your physical and emotional wellbeing.

Could be several things from reacting to pandemic, depression, sleep deprivation, or dealing with a past trauma. Check these links out for some insight..
https://www.rand.org/content/dam/rand/pubs/monograph_reports/2005/MR1198.11.pdf
or
https://www.washingtonhttps://www.psycom.net/sleep-deprivation-depression
or
post.com/lifestyle/wellness/anxiety-coronavirus-sleep-memory-anger-focus/2020/04/03/61dab1b0-75b9-11ea-85cb-8670579b863d_story.html
or
https://www.medicalnewstoday.com/articles/323441