My period is late.

O

I had protected sex 2weeks ago. There was no pemetration without the condom on. He brought the penis(without condom) near my inner thigh,but it surely didn't touch my vaginal area,before having sex. Pull out mehod was also used. Weirdly enough,we did a water test for the condom. It apparently seemed to have no leakages. I was really stresed all this time.It has been six days and I my periods didn't start.I took a medicine that is supposed to get the period early. But I had nothing but a few cramps.

I am stressing out.I am scared.I am feeling lost.

I can't even understand how there is a chance that I might be pregnant. I was protected all the time.I had a home pregnancy test 2 days ago. It was negative.