I Bluffed My Way Through a Big Project Meeting

So I started my first job at this tech startup about two weeks ago. Everything was going well until today when the boss called me into a meeting with the whole team to discuss my progress on an important project. The thing is, I've barely gotten started because I still need training for some of the software tools we use here. So instead of admitting that, I pretended to know exactly what I was doing and nodded along as everyone explained their parts. Afterward, I felt sick with worry thinking about how much trouble I might be in or how they could think less of me now. Is it normal to sometimes feel so overwhelmed you just make things up? What should I do next?