I currently have a 3.8 weighted gpa and I’m almost certain that I will fail these two classes due to outside circumstances do you think ECU will rescind my acceptance?
In short, yes.
Do whatever you can - extensions, extra credit - to get a C. Do whatever the teacher asks, prioritize this over anything else. If you have a valid reason (not excuse) present it at the time you ask whether you can do to not have an F.
The rule is no F, no D, no cheating, no crime.