yep thats bad. That will cause root rot if you don't change it quick. Drain any excess water from the tray. Four days old and the roots are growing out the bottom of the pot? If thats accurate you need to put them in bigger pots asap. You will damage some of the roots that are hanging out the bottom of the pot so don't be suprised if they droop a little after the transplant. Some pictures might help.