GBS question

So I haven’t had sex with my SO in a couple because we just haven’t been in the mood. He’s busy with work and I’m busy making a baby. The timing is always off. He’s taking time off work and has been spending a lot of time with me and we ended up having sex and it was magic ✨. I tested negative for GBS about 3 weeks ago and it’s been MONTHS since I’ve had sex with him. Could I have introduced GBS? I’m 40w pregnant and could give birth at any moment. I don’t want to have sabotaged anything. I’m feeling pretty shitty. Maybe I don’t understand gbs completely? Please help. FTM