The Lions are just four points and three places above the drop zone after back-to-back defeats to Bolton and Middlesbrough.
Goals from Emmanuel Ledesma and Albert Adomah secured a 2-0 win for Boro on Saturday and ended a run of seven home matches without defeat for Steve Lomas' side.
Forde said: "We're very disappointed, particularly after the home form we have had recently. We weren't at it and we weren't good enough.
"It's onto Watford now, a team we haven't had a good record against, so hopefully we can change that.
"It's a massive game because all of a sudden we've lost two on the bounce and we need to respond. The pressure is on for the Watford game."