How to stop pregnancy scare?

Pb

So here it goes, I am not ready to have a baby yet. I already got my period and had a negative pregnancy test 1 month after we had sex but I still have this kind of scare. I doubt the sensitivity of the pregnancy test and I read other women's experience that they didn't know they are pregnant until they labor and stuffs. I am scared until now of the possibilities even if I already talked with my doctor and told me that I am unlikely to get pregnant. How to stop pregnancy scare?