Creating new holes?

I didn't expect the Bucs to go all Dan Schneider in FA this season.  I figured we would make solid, decent cost signings. Melton and Carter fit that bill. What I didn't expect is to have more holes than we originally did before FA started.  The holes seem to be mounting, and we obviously don't have enough draft picks to fill them all. I'm expecting a few more signings "on the cheap". I am getting very nervous that they will trade down from #1. I don't want to lose a shot at a potential franchise QB...