If I Stand For A Short Amount Of Time In
I would recommend as follows:
Detailed Answer:
Hello!
Welcome to Ask a Doctor service!
Regarding your concern, I would explain that your symptoms are suggestive of possible orthostatic hypotension.
For this reason, I would recommend consulting with your attending physician and performing a Head Up Tilt test.
Some blood lab tests (complete blood count anemia, blood electrolytes for possible imbalance, thyroid hormone levels for thyroid gland dysfunction) are necessary too.
You should discuss with your doctor on the above tests.
In the meantime, I would recommend you to closely monitor your blood pressure values and increase salt and fluids intake in your diet.
Hope you will find this answer helpful!
Kind regards,
Dr. Ilir Sharka, Cardiologist