My partner is initiating a pre nuptial agreement before marriage. Should I also have representation prior to signing?

Yes. All people benefit from having an impartial, trained professional in their corner.  Not only is representation provided, but a buffer agent is installed with the ability to answer your questions and protect your interests. Your local bar association should offer referrals.  Those names can then be researched on the internet with an appointment set with the attorney of your preference.  Maybe only a consultation first or a review of the completed document is needed.  That should be a matter better discussed with the attorney.