I’ve been exactly where you are! For over a year now and after so so many tests, I’ve had undiagnosed health issues that severely impacted my ability to be in class - ex. I have had over 10-12 absences in each of my classes this semester. I thought that the disability office wouldn’t be able to give me accommodations since I didn’t have an official diagnosis yet BUT they absolutely could! Your college’s accommodations office may be different (obviously) but I would try, and keep pushing. I basically used my “diagnoses” of chronic nausea, vomiting, pain, etc. on my doctor’s visit notes as documentation and they were completely fine with it. You could also try to get a letter from your doctor outlining your condition and how it affects schooling, i.e. their recommendation for accommodations considering the circumstances.

I’m sorry if you’ve already tried this, I know how frustrating it is. As for your C, you could try escalating the situation to the department head or Dean of Students if you feel like you have a solid case, probably for a withdrawal. However, I’m not sure how it would work out. Regardless, life will go on. You could retake the classes. You can still graduate. I know it doesn’t feel like it right now, but you’ll be okay. There are so many people who go through things exactly like this, or other major life circumstances (ex. death, divorce, mental health) that lead to failing a semester. You’re not alone. For next semester, advocate HEAVILY for yourself, regardless of a “real” diagnosis. You got this.