You are being very observant. I think giving the simethicone was a great step, since a lot of acute episodes of discomfort are caused by gas. I recommend listening to her stomach sometime to gauge if you can hear gas/bubbles/gurgling.
The stress of people coming over can definitely trigger stressed behaviors. I remember Wick being very depressed the day after his first trip to my parents’ home during last winter. People kept walking around his space and disrupting his normal sleeping time. When we returned home the next day, he was on edge and not as enthusiastic. He eventually normalized after another day.
Can you describe the wobbliness more? If she is actually falling over, I believe a vet visit is required — bad coordination is not a good sign because it’s indicative of something more physically or neurologically wrong.
It is good that you were proactive to change the litter and monitor for peeing and pooping. Keep that up!
Generally if you see pooping and peeing, as well as eating, it’s a good sign. Any degradation of that or if any of that stops, a vet visit immediately is good. I think, if funds are available, doing a vet visit sometime this week is wise if you find she isn’t getting better after 24 hours. Things ramp up to urgent when she stops eating or pooping.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.