Yes, you should. How is your blood pressure? Do you have anemia? Do you have a fever? I cannot come up with an explanation that fits all your complaints, but I feel that it deserves more tests, such as head and chest CT scans, and blood tests to make sure that you are OK.
You need go to see a doctor ASAP. There many conditions can result in these signs and symptoms. You should take blood test firstly to confirm whether you are affected by anemia.