Existential crises after an interview rush

I just recently had an interview at Google. I worked my ass off for it but ended up not doing quite well in two rounds (not sure if I'll even make it to HC. I know exactly what I lacked in the interview room and I have a timeline to fix it).. now after the end of it I feel like I have nothing to do!

before the interview there was this goal I was working for and it was such a great feeling to be so determined and focused.. I couldn't think of anything else.. like I was high.. but now, the high is gone in just a moments time. I'll be reapplying after a year but feel that's too far and in the meantime I'll just be a zombie (I guess I have no life and I don't know how to create it for me)..