Mold isn't nearly the bugaboo it is made out to be. What kind of mold? Are you allergic to mold? How much mold? There is mold in the air you breathe whether you are inside or out. Mold is everywhere. It's a matter of what type of mold and how much. The EPA even advises home owners to remediate mold themselves if the infestation is relatively small, with a mold and mildew remover purchased at the grocery store or the hardware store. I would suggest you and your landlord answer these questions and then discuss possible solutions, it's probably nothing to cause a panic. I recently had a client who was able to remediate a home that had certified black mold, the kind that makes everyone very very sick, that was at least an inch thick in the basement of the home, for around $7500. Now the house is fine.