Dog doesn't let me remove her leash/collar

My brother's family moved in with me and my parents and they'll stay here for a few months. She used to wear a chest harness for walks, but started growling and trying to bite when we attempted to put it on, so we switched to a choke collar as a temporary measure cause that was easy to put on. However, now she started having issues with it when I reach for her neck to remove it. My theory is that she is resource guarding the collar (last time I was able to take it out, I dropped it on the floor and when I tried to grab it, she lunged for my hand and, despite having been able to avoid the direct bite, she still caugh my thigh a little).

Today, after her walk, she didn't let me remove it, so she's just walking around the house with the collar hanging. We have an online counseling on thursday, but in the meantime, I'd like to know if anyone ever experienced this and has any advice, please