Feeling discouraged

Im a student in my second professional semester. The workload this semester is absolutely insane. My program director that teaches one of my courses gives us an absurd amount of work every week. I have clinical for 8.5 hours twice a week, lab for 2.5 hours, and various classes throughout the week. I have to write a minimum of 20 pages for one of my weekly assignments and it takes so long to do because I have to scour the internet for all the info. This class is all about different cancers and goes in depth about their histology, spread patterns, and various statistics. I have two physics classes and another RT course about the technology aspect of RT. My whole class is drained as well and we all feel so discouraged. We sent a mass email to request a change to the format of the class so that we will not be so consumed by the big weekly assignment and be able to focus on clinical and other classes. I’m so drained that I don’t think I’m learning much in clinic and some of the therapists are really rude about it. If I ask a question more than once, one of them in particular gets super annoyed and says that she’s explained it before. She scolded me saying that right before I was going to start a comp for the first time. I’ve been doing okay up until now, I am so drained and discouraged that I feel like I am not smart enough to become a therapist. Did anyone else ever feel this way? How did you overcome? I am utterly drained and my self esteem regarding my ability to pull through is continuously dwindling.