Being touched made me feel sick inside

Recently I had an ECG as part of diabetes test which required me to be touched by the nurse.  I immediately felt violated and judged as I'm not in the best of shape and several readings were required.  I held it in and feigned politeness until I could leave.  For context I'm male, asexual and touch averse from being assaulted as a teen and harassed in school and the nurse was female.  I'm disgusted by my own body and want to keep it covered.