thick endometrial lining

Has anyone else had thick endometrial lining & fluids found on an ultra sound?? I thought it was a cysts or a bad kidney infection... but it wasn’t. My doctors called me to tell me they need to discuss it with me ASAP.. but that it’s not cancerous.. I’m kinda freaking out.. Does anybody know what it means??? Does it mean I can’t have kids? 🥺