There are many possible causes for numbness and tingling in your arm. Some are benign, some are very dangerous. I know money is an issue but you need to have the more serious conditions ruled out. You should always see your doctor (not a chiropractor) when you have numbness or tingling that is not associated with the extremity "falling asleep."
Some causes are:
Injury to a nerve -- for example, a neck injury may cause you to feel numbness anywhere along your arm or hand.
Pressure on the spinal nerves such as that due to a herniated disk.
Lack of blood supply to an area -- for example, plaque buildup from atherosclerosis can cause pain, numbness, and tingling this is called vascular claudication)
Other medical conditions, include:
Carpal tunnel syndrome.
Transient ischemic attack (TIA).
Abnormal levels of calcium, potassium, or sodium in your body
A lack of vitamin B12 or other vitamin.
Toxic action on nerves, such as that from lead, alcohol, or tobacco.
The underlying cause of numbness or tingling should be identified and then treated by your doctor. Treatment of the underlying condition may reverse the symptoms or prevent them from becoming worse. For example, if you have carpal tunnel syndrome or low back pain, certain exercises may be recommended.
If you have diabetes, your doctor will discuss ways to control your blood sugars.
Medications that cause numbness or tingling may need to be switched or adjusted. DO NOT make any changes to your medications without instructions from your doctor.
Low levels of vitamins will be treated with vitamin supplements.
Because of the decrease in feeling, a numb hand or foot from any cause may be more prone to accidental injury. Take care to protect the area from cuts, bumps, bruises, burns, or other injury.
Go to a hospital or call 911 if:
Weakness or paralysis occurs with numbness or tingling.
Numbness or tingling occur just after a head, neck, or back injury.
You cannot control the movement of an arm or a leg or you have lost bladder or bowel control.
You are confused or have lost consciousness, even briefly.
You have slurred speech, change in vision, difficulty walking, or weakness.