Hello mam, I did review your concern. Trouble falling asleep and feeling exhausted can be due to multiple reasons- organic or something related to our mind. we see many patients in routine with problems like yours. I would suggest you to meet a doctor preferrably a
endocrinologist and/or a
psychiatrist since, it could be a
thyroid problem especially with the gaining weight problem you are having. Also, another reason could be
sleep apnea obstructive or central type which can be detected by a sleep physician better in detail. Meanwhile I would advice you some suggestions on good sleep habits-
1) cut down coffee/stimulants intake if you are taking a lot, esp in evenings.
2)Go to bed only when you feel excessively tired and sleepy. dont do laptops and tvs on bed. its a major cause of sleep initiation problem in youth these days.
3)exercise in evening or morning, but not just before you sleep.
4)Dont eat extremely heavy meals just before you sleep.
I hope this helps. Do let me know if you have any more questions or concerns. I will be more than happy to help you.
wish you a healthy life ahead.