I Feel Like I Might Have Some Sort Of Social

I feel like I might have some sort of social anxiety disorder. I seem to have some of the symptoms of SAD: eating in front of other people scares me, always looking down when walking, having trouble speaking in front of others, just being scared in general of what other people think of me. It's really been getting worse since high school. I have trouble in social situations with people I don't know well/am fond of, and I've been scared of relationships. I feel like I might need to consult a psychiatrist here, but am not sure if I need to go through with the payment.