Do I go back “home” for 3 weeks or find another country?

 I’m currently in Spain and I was applying to extend my visa and I really thought I was going to get it based on the information I read. However now I got rejected and I have 72 hours to leave Spain🥹. I have to be in London at the end of May but from now until end of May I have NO idea what to do.

One thought would be going back to the US with my parents for those 3 weeks Which makes me sad as it’s going to be trigger land lol. I just don’t know. I was so sure I was going to be able to stay, it made so much sense and things were really aligning but then bam now I’m just lost. If I go back to my parents at least I would save money and won’t be paying for anything at all but my mental health would be going though it (perhaps a test I need to go through?) any advice or help would be appreciated :( another option would be to find a non Schengen country for the next 3 weeks but I feel like that’s going to stress me out even more. I have no idea what to do