Manager testing my SA and making me miserable.

[Nofeetmode]

I work in food service, most of the time in a kitchen with three to ten other people. I like my job enough and I’m pretty comfortable with my coworkers.
My biggest issue is when they want me to work the register, this involves dealing with customers, taking their orders and money and handing out orders when they are done. One manager in particular tends to put me on the register during dinner rush on Fridays. Every time I am up there and the rush gets going, I start to panic and feel sick. My heart starts to beat like crazy and my mind goes totally blank. Then I start to make mistakes and everything falls apart. It’s around then that the owner of the restaurant will see my panic and remove me from the post. It’s embarrassing and leaves me feeling sick for a long time afterwards. Not to mention it makes me look completely incompetent in front of my boss, the owner.
My issues with social anxiety are no secret in my work place and I feel like this shift manager is harassing me by doing this. The other managers agree how ridiculous it is to make me deal with customers during the busiest and most chaotic time of the week in food service.  One of them suggested I work the register during slow periods and gradually work up to the Friday rush, but that’s not what happens. I’m placed on the register ONLY Friday evenings and always by the same manager.
I can’t tell if the harassing manager is trying to get me into trouble or thinks she’s helping with her own version of exposure therapy. Either way it makes my job way more stressful then it should be.
I guess I’m not really looking for advice. I did find out a few days ago that the harassing manager was leaving for another job. That was a big sigh of relief.
The point of this story is I feel like some people don’t understand how the anxiety works. I’m not being lazy or selfish because I don’t want to work the register (they get more money, btw). I actually feel sick when this happens; the reaction is physical and uncontrollable. Also I’m not trying to get attention or pity from people. If I could go the rest of my life not having to explain to anyone about social anxiety, I would. Also, I have had these issues for more then twenty years and I am working on them! They will not just go away after a few shifts of brief interactions with hungry strangers.
I just can’t wait for her to be gone. I do not need this kind of stress from some minimum wage job.
 

[Cuchculan]

Could you not tell this manger that she knows your sistuation and you are not able to handle the rush hours. It is only making you worse. That you have never kept any secrets from her in the past, so you are been up front with her about this too. You might also get some of your fellow workers to have a word with her too. By way of showing they are all backing you up. If you can't do it, you can't do it. You should not be forced into it. If this manager has seen you fail at it in the past she should know you are not able for it. Ask her a straight question from me. ' How many times must she stand and watch you crumble, unable to handle the rush hour queues, before she accepts the job is not for you '. I am sure others are willing to do the job. It won't be like she is stuck to find somebody else. Just have to be honest with her. We hate to admit we can't do things. But there comes a time we have to say those words. Just see where it gets you. If she backs off. And I agree with the other workers about working there during the less busy times. Just to get the training. Either you have a word with her or trust in someone else to have a word with her. It is the only way things will ever get sorted out.

[Nofeetmode]

I have talked to a few people about this at work. The first time it happened and I was sent away she took me aside and asked me what happened and I told her honestly what was going on. She's aware of what she's doing. I don't know what her motivation is, either she doesn't believe me or she thinks she's helping me by doing this, or maybe she doesn't like me. Whatever it is doesn't really matter because she's leaving for another job so I'll never have to work with her again. But yeah, I think next time I'm in a similar situation I should just stand up for myself right away. When I was young I was pushed around by a manager so much that I walked out and never went back. I never want that to happen again. Just because someone gets paid more doesn't mean they can bully people like that.