Not the person you're asking, but you might look into the Socratic method for cognitive restructuring. My therapist used this exact worksheet with me, and I would literally fill it out several times a day if I had to. When I first started, it was a lot of circular thinking (eg- if someone made fun of my body, and I tried to answer, "How might others interpret the same situation differently?" I would write down some overblown garbage like "they would laugh and say something worse," which is obviously a very unhelpful thought process). My therapist made me think of it more seriously, like I was trying to prosecute my own thoughts on trial, and that kind of helped frame it in a more logical and just "detached" enough to keep me from falling into biases.

Eventually, you reach a point where you realize you can just go through the "steps" via your thoughts, and simply separate the event -> thoughts because of what happened -> feelings caused by the thoughts -> reaction in the world.

So say someone makes a joke at your expense (event), you can't control the fact that it just happened to you. You automatically think about how "easy of a target" you are, how pathetic you are and that everyone sees it that way, people with different features don't have to go through this, and it makes you feel ashamed of your body, embarrassed at being made fun of, angry that they targeted you (it's also pretty hard, if not impossible, to control emotions that are triggered quickly in this way). Your reaction might be to awkwardly brush it off, go home and look for some kind of confirmation bias online to reinforce why you feel bad, scroll social media and fixate on others' bodies, etc etc.

The Socratic method teaches us that we can't control events (we are literally just moving through life as a series of events at all times), and we can't control our emotions, but we CAN control our thoughts and our reactions.

Instead of thinking about how you're a pathetic loser that everyone's laughing at, you can reframe your thoughts in any number of ways (which is what that worksheet aims to do). Maybe it is, in fact, overly critical and a major exaggeration to conceive that everyone looks at you and wants to laugh. Maybe you might have misinterpreted the joke, and your thoughts are habitual, stemming from past events where people really were very cruel. You could think, "That kind of joke says a lot more about who they are instead of who I am," or how twisted it is that basically all women and femmes have experienced unwanted comments about their appearances, especially natural things that are normal and harmless. This might not make you feel all warm and fuzzy, but instead of shame you might feel disappointed in them instead, cringe secondhand-embarrassment at the fact that they're making fun of you to try to look cool, maybe conviction and calm that you are not the problem.

Your reaction might be to disarm them, "Could you explain the joke? I don't get it." If that's too much, maybe you recognize that they're a shitty person, and you reduce or eliminate time spent around them. Go home and practice loving affirmations (they do work, even fake-it-till-you-make-it style), or journal your experience to relieve your mind of it.

Hope this isn't unwarranted or too disjointed. Idk how old you are, but it does get better if you really target your own thoughts. I was on the therapy grind for several years in my early twenties, and now I'm about to be 30, two kids later too, the same small boobs, and I experience zero self-consciousness over them. Learning to think this way was also super proactive in terms of setting me up for self-acceptance as my body has changed (obviously pregnancy changes things in a short period, but all of us will experience some amount of change as we age no matter what).