I have trouble making eye contact with people. Autism, ADHD, Anxiety, or a mixture?

For as long as I can remember, I have not been able to maintain normal eye contact with people. I usually look at them for a few seconds and most of the time will look away if they look at me. I have ADHD as well as anxiety. Low self esteem. Social anxiety. Almost no confidence. I almost feel uncomfortable if I hold eye contact with someone for too long. I feel as if my eyes are almost going in apposite directions lol maybe I lack the confidence to do so.