Lots of querries it seems you are in a great problem .
for ist issue of sweating. Check your thyroud profile. You may be hyperthyroidism
now as sweating more is a sign of hyperthyroidism.
Issue 2nd appears to be of obstructive sleep apnea
which usually happens if you are overweight
. Need a ent checkup.
issue 3 of itching too needs a check up for diabetes as some cases do present with itching.
also check for some materials or food causing allergy.
Issue 4 5 ..it seems you are having some symptoms of depression
like low mood tiredness
etc.just think again.
issue 6 kindly visit a medicine doctor.