Answer: Extension
Explanation:
First off, if you are sick, you should be emailing your teacher or telling them in person. Therefore, the FIRST solution is to ask for an extension.
Second off, if you can present tomorrow, take cold medicine and try to recover quickly by drinking the correct amount of fluids. Hopefully you already have what you are going to say. Therefore the SECOND solution is to ask for help from your group and try to recover.
The third and final solution is tricky, it will be very complex. The problem is if you're in person, you cannot do this, and it only works online. You will need a second device in which has a clear enough mic to sound like you, yourself personally. Then, you find a stand to put the device on and click play, make sure it sounds okay at the correct volume over the conference. Remember that this is a risky strategy and that if you're on cam, it won't work because they won't see you talking.
In conclusion, you will probably have to email for an extension and try for the second solution. I hope this helps :)
BB76