Good Luck to you! Jill
Check in with a local Realtor. If you are in a resort area, there very likely will be short term furnished rentals available. Depending on the season, you will either pay a lot or a little (off season) It will take some digging on the part of an agent who is dedicated to customer service as commissions for these rentals are usually very low.
One good place to look for that is Craigslist. You might be able to find a 3 months lease, furnished.
You might also be able to ask Realtors and see if some of the owners might not mind renting their home out for a few months while the house is still on the market. Although for that, you will need to allow them of the convenience of showing the house and promise to keep the house in showing condition with short notice..