We weren't there to hear how much detail you've given her or the quality of her chuckle, but unless you ask her about it, there's really no way of knowing what she meant by it.
But assume she meant to crush your heart (I doubt it, but let's take the worst-case scenario). That would say quite a lot about her character. Do you want to have your heart crushed by someone being deliberately cruel? That would simply give her a victory over you, and possible ammunition to use against you in the future.
Most of us don't know this, or find it extremely surprising when we learn it, but we don't HAVE to be victimized by external circumstances or other people's opinions of us. We don't HAVE to have other people's approval in order to have good, satisfying, and happy lives. If you need help getting to a place where you can shrug and let loose of YOUR trust issues, check out this website: www.TheWork.org. Watch some of the videos. Download the free materials, the Judge Your Neighbor worksheet and the Four Questions, and get working. It's for your own good, your own freedom.
I'm sorry you're struggling physically. I know how difficult pelvic floor damage can be – I've lived with it myself for 40 years. I hope you get better!