Tone if your buyer does not perform on time that is the chance to put new items into the contract or keep the earnest money. Lets hope everything goes well but if it doesn’t, think about demanding things that protect your interests better….like some period of occupancy for you after escrow closes and get the 72 hour clause put into effect if it isn’t already. After that you have your agent put the house fully back on the market for offers.
Good Luck.