Hi Julie,
I assume that you are aware as to whether the form was delivered to the DWP?
As it is only 2 weeks, there is nothing to worry about. The wait varies and could be a month or six months, hopefully a couple of months.
It would be a good idea to prepare for the next stage/assessment in the meantime by reading through the Benefits and Work guides.
www.benefitsandwork.co.uk/guides-for-claimants/esa David