Welcome to the forum.
If you had a bruise
below the right eye due to some injury
or hit, you should get examined by a doctor. Visit an emergency room without loss of much time as internal injury to the brain can cause headache, light-headedness, dizziness
and other complications later.
It seems you are having low blood pressure. Try not to get up too quickly from bed, get up slowly. This will not cause your blood pressure to fall sharply.
Get CT, MRI
, EEG,etc done to rule out any internal injury to the brain like inflammation, swelling, haematoma
,etc. You are in need of medical attention.
Get treated well, you will be fine. Take care.