Mazal tov on your upcoming wedding!
There is actually some debate on the question that you ask. The opinion of many authorities, including the posek of this site, is that if there are no more than
four halachic days between the end of the
shivah nekiim and the wedding, no additional
bedikot are needed. Therefore, in your case, since the end of your clean days is four halachic days from your wedding, there is no requirement to perform additional
bedikot before the wedding.
Please review our article on stains,
ketamim, which may help you avoid having to start over again unnecessarily.