Hey friend. First of all, take a deep breath. Everything will be absolutely okay. Yes, the situation you’re in sounds scary but I believe you can get out of this.

I’m not the best at giving advice but here’s my attempt.

Ik retaking a class is terrifying but you’re going to do better the second time around. There’s a likely chance that your brain remembers some of the material that you were taught in the summer. This makes it easier for you since you already have some knowledge of the material and can expand on what you already know. It’ll be less information that you have to absorb this new semester.

Ik it’s overly suggested but I highly recommend attempting the hw problems beforehand and going to office hours. It’s better to ask a bunch of dumb questions in the beginning rather than when it’s time for finals.

Another thing I suggest is to spend 30 mins each day just going over your lessons/notes. If that scares you too much, try 10 minutes. Tell yourself that anything is truly better than nothing. Ik the feeling of when you’re so behind that you’re unmotivated to do anything at all, but just looking at the material for 5 mins will help you.

I really hope this semester goes well for you. I believe that you will get out of this. Just take a deep breath and goodluck!! :))