Brief Answer:
This could be due to low blood sugar or low blood pressure

Detailed Answer:
Hello
I share your concern
Dizziness with lightheadedness in morning could be caused by any of these
Diabetes or low blood sugar (hypoglycaemia)
Low blood pressure
Inner ear problem like vestibulitis or labyrynthitis

I would advise you to consult your doctor for examination, recording of blood pressure and a battery of tests like blood for hemoglobin, CBC, Liver function test, Blood sugar fasting and post prandial and an EKG
if nothing comes conclusive please visit a ENT doctor for check up, than it could be BPPV (benign proximal positional vertigo )

If you can provide me more information like complete medical history or any other associated symptoms,I will be able to guide you better

Meanwhile take extra precautions while standing up to avoid fall and subsequent injury.
Don't stay alone .

I hope this answers your query
please feel free to ask for more clarification I will be happy to help you
thanks and regards

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