Hey Liza I'm currently having a very similar problem. I asked one of my supervisors at my job (working in an elementary school, for a tutoring program). However that is my only LOR at this moment. Last semester one of the professors I was planning on asking prior to COVID, turned out to be awful and dealt with the online switch/students very poorly. Long story short that professor was going to be my 2nd LOR and after everything that happened during COVID I could no longer ask. I am sort of freaking out as well, because all the programs I plan to apply to ask for 3 LOR. I was thinking of asking my program advisor, and two of my current professors. However, I don't know the proper etiquette to asking a professor especially while you are still taking their class. If I don't ask my current professors I don't know what I will do.