Anxiety stopping me from doing what I love

Hello, just as the title states anxiety seems to be stopping me from doing what I love. Im currently completing my bachelor's in secondary education and I love it. I love connecting with students and teaching but my anxiety sometimes makes me shut down. I am taking a course in which I need to complete some observations and teach a class surrounding my subject and as soon as I read the syllabus I felt the sense of impending doom. All the what if's came into my head and just wont leave. I cannot drop the class since I need it to complete what is left of my coursework. I love doing this but the impending doom feeling right before Im almost done even has me questioning if I chose my career path correctly. I have loved this since I was a child and all through my undergraduate program, so I don't understand why now. I am afraid/slightly embarrassed to talk about this with peers since the education career in my country is seen as "less than" so all the comments I have received in the past just tell me to switch. I have taught classes before with no problems so I can't pinpoint what exactly is making me react like this. I just started therapy again and have been referred to a psychiatrist but I am afraid nothing will work. I am unmedicated and practice yoga/breathing to calm myself down but the rabbit hole has gotten quite deep. Any advice on how to deal with this before I am able to see a psychiatrist or my psychologist to help would be greatly appreciated.