Im sorry you’re having these feelings, but they are pretty commonplace. I predict that in about one year you will be very, very thankful that you’re not 150k more in debt for medical school. After the smoke from the admissions cycle and starting med school clears, I think people are happiest if they are able to find community and support where they are, and work to have as healthy of a work life balance as possible.
As for matching, that you are interested in 3 radically different specialties simultaneously tells me that you have a lot of room to discover what you actually want out of your career. Your mind will likely change several times. The good news is setting yourself up to match is mostly on you. School can help, resources can help, but it’s mostly on you. Keep an open mind, and although this might be controversial I always say that the best thing that can happen to you in med school is discovering you will be happier with “less” (less competitive specialty, less work, less money) because other things matter to you more. IMO more people should be thinking “how the hell do i exit the rat race as soon as possible” rather than “how can I match neurosurgery at ucsf” if the objective is happiness. If happiness means neurosurgery to you, that’s great! But best to find that out sooner rather than later.
Luckily, step 1 is pass/fail so you dont need to jump on the boards grind right away. I’d suggest exploring during your first few months of med school by shadowing and talking to people in various specialties that seem interesting. This will help you identify your interests and also potential mentors for research or other projects. Be the best med student you can be, and after you pass Step 1 you can focus on CK and performing well during rotations to stand out for the match. Won’t be an easy road because med school is tough, but you will in a much better position life-wise after the very, very short 4 years are over, trust me.