Thoughts.
1. Welcome to being an adult in charge of your own future! It's a stressful time. It's also natural, don't worry about this so much; I assure you this is a temporary thing, you'll get past it just fine if you just work through it and watch your physical health. We've all been there and survived.
Rhythm isn't something you can just lose and not get back! If you had it before, you still do now. This certainly nothing that is going to impact you a year and more from now and your entire future; take care of today and tomorrow will take care of itself. And take care of yourself like others have said. You're thinking way too much about this.
2. There is a timing difference as many have said. You have noticed it, so like I said, your rhythm is just fine, your fingers just aren't cooperating yet. My point would be to listen to yourself, when you hear your notes, rather than concentrating on what you're hands are doing. Relax, and just let your fingers figure out how to make the sound come out when you want it to. What you have to do and how you do it isn't important, it's the sound that matters.
Rhythm isn't something you can just lose and not get back!
Just play. Look up the story of James Brown/Bootsy Collins' "The One," best piece of advice I've ever been given. You'll know it when you hit it and then do it until it becomes natural. Exactly what Funky Phantom said in the previous post.
This sounds like something I experienced at an extreme at about the your age; going from an electric organ to a real pipe organ to play at a friend's wedding! You would not believe how strange it is when you push the keys but the notes don't sound for almost another full second!!!!! Weird, weird, weird. But you learn to play waaaay ahead to make the sound to come out when you want it to.
See, exact same thing. It took a little while and was very disconcerting at first, I thought I was going to screw up my friend's wedding. But then after a while it just clicked and everything was fine. Well, except for their marriage, but that's another story. Unfortunately since then I've never had another opportunity to play a pipe organ, and I'd actually like to try it again now forty some years later.
3. By the way, congratulations, you've got the blues, young man! You've earned the right to play them, for sure. Maybe try playing some, it always brings me up when I'm feeling down.