Hi and welcomet to HCM,
It can be neuropathic pain
due to abdominall wall or spine nerves impact. But also it sounds like ureteral or gallbladder colic
which can be felt on this side too. If you feel it again you should do abdominal ultrasounds to rule out some intraabdominal pathology or inflammation. This kind of pain is often experienced and it shouldnt worry you if this last for second and doesnt repeat. WIsh you good health.