1993 Toyota Corolla loud noise when accelerate

Haven't had any issues, regular maintenance done but once drove today car was pretty loud and when accelerated and could feel something moving underneath the car. It sounded almost like a muffler with a whole in it, not sure if its the transmission, caddy converter or what. Was still drivable but feel the power was much less. Didn't feel comfortable going over 35mph. Does anyone know what theis could be? There was only one previous driver (old lady)