Moved into new rented house

I feel like I’m going crazy. My SO and I moved into our new house we’re renting on the 23. Ever since then, I have felt sick. Dizzy, sometimes nausea, congested, just not well. The house is literally 100 years old and the floors are slanted so I thought maybe it was my vertigo but now I’m getting headaches and I can’t walk around outside or inside the house without feeling dizzy. My SO notices the floors but he’s fine otherwise.