There are times that people can forget things when they are in the state of pleasure and one of the things you might forget are wearing protection.
First, you have to communicate with your partner. After asking them try to tell them to be honest and be calm and then ask them when was the last time they were tested.
It should always be the protocol that you will do in case of every emergency like that that will happen. As we all know, these things are not one hundred percent effective.
So it is better if you come back and ask for another schedule, like after six weeks.
Whilst you are at it, try to be observant and feel for any changes in your body.
If you do it without protection then you should be prepared from the consequences.