I don't know what extrasensitive to bright lights is but was embarassed to admit it. Can someone tell me?

Light sensitivity. There are many causes for increased light sensitivity but in most cases you should see an eyemd to check for iritis or other inflammation.
Photophobia, light. Sensitivity (photophobia) to light has degrees and myriad of causes from dry eyes, allergic or infection of eyes surfaces to occurring after a seizure, migraine etc. While often short lived and thus likely not serious any prolonged or recurrent photophobia should be discussed with your health care professional.