@Rhadonna0 Yes, you should be extremely concerned.
This guest misrepresented her intentions and moved into your home with no intention of leaving at the end of the Airbnb booking. It's crucial that you are aware of your state's right - of-tenancy laws, as in many locations an Airbnb booking is considered sufficient for the guest to be considered a rightful resident of the home after 30 days or in rare cases even less. Airbnb only collects the first 30 days of rent upfront, and if subsequent payments fail, there is no longer anything they can do for you.
That would leave your landlord with the burden of evicting a squatter, which might currently be impossible due to emergency eviction moratoria, or complicated by elaborate court procedures.
And unless your Airbnb was permitted by the terms of your lease, the landlord would most likely evict you as well as the "guest."
Don't let another hour go by without finding out what eviction laws and protections currently apply to the guest. If you determine that she is yet eligible to be considered a resident in your home, it's imperative that you terminate the booking before that can happen.
Getting all of her belongings out of your home without attracting attention won't be easy, but somehow she got them all in there without you noticing, so I guess it's not impossible.
Finally, if your sublet isn't allowed by the landlord, I would strongly recommend canceling any future bookings and delisting before there's any further opportunity for you to be at risk of losing your home.