Clinical psychologist specializing in body identity transitions. What you're describing is a textbook presentation of what I call somatic imposter syndrome — the feeling that your physical body is inauthentic because the method of change doesn't align with cultural narratives of "earning" thinness through suffering.
Let's unpack the belief: "I didn't earn it."
Did you make the appointment? Did you research the medication? Did you inject yourself every week? Did you deal with nausea, fatigue, and GI side effects? Did you show up to your own life every single day in a society that shames both fat bodies AND the methods people use to change them? Did you navigate the emotional upheaval of losing your primary coping mechanism?
You earned it. You're earning it every day. The medication is a tool, not a cheat code. A surgeon uses a scalpel — we don't say they "didn't earn" the surgery because they used an instrument.
The imposter feeling will fade as your psychological identity catches up with your physical reality. But it takes time. Be patient with the lag.