The future of the automotive industry is breaming with technological advancements and breakthroughs: for instance, connected cars that are internet enabled and linked to computing/data cloud, autonomous vehicles, hybrid and electric cars. Therefore, a future in auto engineering can still be exciting and dynamic. Over the next 10 or 20 years, you will likely keep learning (on the job or certificate programs) if you opt for a career in auto engineering.
Discover what the trends in that industry are and determine whether it makes sense to specialize in some segments, specific areas of auto (examples: hydrogen cars, batteries, auto OS/dashboard, body/color consulting, customizations, flying cars, etc).
Take the experience learning about aircraft as part of your overall engineering, learning journey. It doesn't have to be a disappointing outcome. Talk to your career office at the university and professors to determine if/how to pivot. Go on Coursera.org and find out if there are open resources about careers related to auto. Also, go on LinkedIn.com next week, type in 'auto engineering' and take a look at what kind of companies (startups or large MNC; hardware or software; research or application) are hiring - a potential hint into the near future at least.
And reach out to your current school for student counseling services; find out about how helplines in your state could offer support. Talk with your parents or family as they may already know a counselor or therapist in your region.
I came across the following (based in Greece):
"A helpline with experts providing psychological support to people struggling to deal with the impact of the coronavirus pandemic on their daily lives started operating [recently]. The helpline, reachable on the number 10306, is a joint initiative of Greece’s Health Ministry and the psychiatric clinic of the University of Athens’ Medical School, in collaboration with the ARGO federation of mental health and psychosocial support groups." https://www.ekathimerini.com/251356/article/ekathimerini/news/psychological-support-helpline-up-and-running
Remain optimistic and talk with your parents/family for suggestions and someone to talk to.