Steve, That is good advice from Shell which I totally agree with.  Life is for living and enjoying whichever way we choose and we can all have regrets about the outcome of choices whether the time was right or not. 
It is a known fact that retail therapy makes you feel good so as long as the you aren't chasing a short lived 'buzz', then go with the flow. 
I think maybe the advice from your counsellor was more about making decisions too soon that can't be undone,  such as moving from your present home, disposing of things etc.  You can always sell the cars if things don't work out!