Joan, the big boys are having fun, but I don't think they know how easily they can confuse you, or how useless their banter is for meeting your needs. Don't get sucked in by using gear you don't understand to electronically solve your problem. What Littledog said is a good place to start. Point the mic at an angle to the stream of your breath (off axis) rather than pointed right at your mouth (on axis).
Next, give up the idea that the mic by itself will just capture your voice the way you want. It won't, any more than a camera captures things perfectly, so you don't really need a photographer. God, I know it's work, but you have to control your sibilants/sibilance (both words work in this case, just for the pedantic above). Controlling your sss's requires you to *think* while you're recording, and take responsibility for how your words are formed and sounded. As a singer, I understand that a microphone is a *tool*, which you can use well or badly. First, turn it to the side a little, then simply hiss less, shortening and softening all your s's. If you have a continuing problem that really, really cannot be solved by technique, only then consider de-esser plug-ins. Don't buy expensive gear to cover up poor technique- improve your technique. Hope this helps.-Richie