I am sorry to learn of this situation.
Currently you are what is called a "holdover tenant" or a "tenant at sufferance" (the two terms are used interchangeably) and basically mean that while you have no written lease you are permitted to remain in the unit on a month to month basis as long as you continue to pay rent.
You should have exclusive use of the property (so if you had use of 100% of the unit for the rent you were paying, the landlord should not be permitted to move anyone else in, if you had use of only a portion of the unit (for example, a bedroom and kitchen privileges), you would continue to have use of that portion).
If those rights are impaired, you have been "illegally evicted" (the landlord has evicted you without notice and without a court proceeding) you can sue and recover damages.
The landlord can however terminate your tenancy with only 28 days written notice. (see: https://docs.legis.wisconsin.gov/statutes/statutes/704/19). If the landlord gives you 28 days written notice and you refuse to leave within that 28 days time, the landlord can then file an unlawful detainer ("eviction") action against you in court, and you will then be subject to a court judgment for possession, and a forcible eviction order (where the sheriff will actually force you to leave the property).
I recommend contacting your local housing authority for assistance in getting a new place to live. Notify them that you do not have a place to live as your current residence is being terminated and they can assist you by placing you higher on the list.