just had a phone interview. stuttered a whole bunch and now feel like shit

just had a phone interview. stuttered a whole bunch and now feel like shit recently i graduated college and have been applying everywhere to things in my field (biology lab work). truth is i didn't properly prepare at all. i wasn't expecting what was basically an interview right off the bat. they just told me would contact me!! i barely knew what to say half the time, large gaps between words, gave a bunch of half-assed answers to everything. the person was polite but still... i definitely dont think i got the job. i'm not giving up yet but next time im going to prepare just a vent post thanks for reading