If I'm honest, my parents have always advised me to become a doctor, so I've never really thought about being anything else... So I can't give you advice regarding other career paths except that you must must must know which goals you need to achieve and you must must must work hard because nothing in life comes easily^^

The thing is, you may think that being a doctor is overrated, but seriously, it's not! Not at all! My aunts are doctors and they're living a very relaxed life and they have all they want, pretty much! But they worked hard.

And if you're worried that you won't be able to be a doctor because you feel you are lagging behind in your studies, THEN DON'T WORRY BECAUSE IF YOU TAKE EVERYTHING STEP BY STEP, YOU WILL ACHIEVE YOUR DREAMS!! It sounds really cliche, but trust me when I say that by pacing yourself and making a schedule and sticking to it, and setting realistic goals, you WILL get there! I know you can do it xx

Is this your senior year? I'm only assuming because thats usually the right time students start to think about progression.
From experience, you can always choose "undeclared". Now financially that's basically wasting a year worth of schooling and bills, but if you are not committed it's the easiest way to be committed.
From experience I regret becoming a business major. It's a little bit too late for me to change majors since I've done so much.
I wanted to become an architectural designer or a graphic art major, but my parents disagreed saying those majors don't make a lot of money.
They were wrong(Maybe being a graphic designer might have been a stretch in the money making process). Haha. In a sense, don't listen to ANYONE, but yourself. If you can't find the answer now, it will slowly be seen.
Life is all about choices, but the choices you make do impact you.

What do you feel comfortable doing???
What do you picture yourself working as in five, six years??
Think about it and you'll know..

I kinda at advising.. Hopefully it was useful

Based off of what you wrote... I guess you should go into Forensics?
Anyways... I think you should just explore what you like! Maybe take a small break from school and just explore your interests. I had that dream too, of being in the medical profession, but after watching so many of my favorite groups perform on the stage and doing it myself, I found myself to want to become a performer as well!
I guess, what I'm trying to say is... Don't be afraid to change your interests! As long as you're happy in the end that's all that matters! Good luck ♥

Maybe you just aren't asking yourself the right questions. If you like the medical field so much, what is it about that field you like? Or if you like law enforcement, what parts of it do you like? What parts don't you like? What makes you happy, not career wise but on a daily basis? Do you enjoy helping people? Do you like socializing? Instead of over thinking and driving yourself mad (like I do) just try to ask yourself different questions, more detailed questions.

I don't know if this will help at all but just know that you aren't alone. It's hard picking a career and some of us spend our whole lives searching for the right one. But it's the journey that defines us, not the destination. Sometimes you just have to find yourself before you can decide where you are going. ^_^