Self perpetuating fears ?

I have some thought about what I would define my condition to be but instead of saying what I think it is, I'm going to state some cases and see what others can come up with.

Case 1: I almost lost my job because I could not pee in a cup when asked to for a random drug test. I know that I normally cannot pee in public unless I feel there is no one around. I spent 4 hours drinking water and trying to pee. My bladder felt like it was gonna burst, but I could not pee. 10 Minutes before the woman there was going to send me away I was finally able to do it. There is never any trouble at home.

Case 2: I've had 1 girlfriend in my lifetime (24 years). With this girl, about 80% of the time I could not achieve an erection caused by the fear of not being able to achieve one. This is never a problem when I masterbate. It shot my morale and I have not thought to search for a new partner since then until I have figured out this weird psychological issue.

Case 3: I had a job interview the other day for a tutoring job. I was asked to do simple mathematics on the board. I couldn't do it. I have just finished my final semester of calculus and couldn't do simple algebra in front of these people. As I went up there to do the problem I started to do it and then could suddenly no longer think about it.

People I talk to say to not care what other people think. But I am not really ever thinking about other peoples judgements. I used to be extraordinarily shy, like... can't order your own hamburger at age 18 shy. But in my quest to become a more well rounded person, I have since gotten rid of that, and I have no inhibitions about asking people questions I am curious about. But after removing my shyness, my perpetual fear remains. It cripples my love life, and professional life.