scared of getting pregnant 😢 help

Brienna

alright so five days ago we had ups and downs in one night after my period end, we used condom and everytime he wants to come, he come outside, after that he checked the condom (we used durex extra safe)whether its broken or not, he checked and none of them was broken. But what scares me is two days ago I had like nausea. is it because I'm too tired (was having so many activites and kinda stressed out) or because I'm pregnant? I'm so scared 😢