Given the improbably timeline to get your dream home, I suggest you negotiate with the buyer of your current property to rent it for 6mths while you continue to search for that home. If the buyer is rushing to move in, then rent elsewhere. Your tension is if u rent and home prices don't fall, you will incur rental cost but if u secure a unit tomorrow (can just ask for few weeks extension from your current buyer) you risk getting a unit that is less than a dream home. But like many who has mentioned, never rush to grab a property or else you have the next year to regret. Its not like doing your grocery.
Property prices should be pretty stable for now. Even when it is climbing, it is still at a quite acceptable rate. I suggest you pen down your requirements for your dream home (like near mrt / freehold / near ammenities / condo facilities / price range / old or new condo / no. of rooms / etc.) Then get an agent to help you do the sourcing and running around. Hopefully something good comes along in the next couple of weeks or months.