Transferring classes if I’ve already done a lab

Hello! I didn’t know today was the last day to switch classes so I don’t have time to book an appointment with academic advising. I want to switch my physiology class to the online version, but I already did one of the labs. Is it still possible? Am I going to be penalized for the lab I did already in the in-person one? Let me know if you’ve been in the same situation (switching classes after a lab)