Pregnancy scare

I’m currently on day 36 of my cycle and My average cycle length is around 30 days. my last period was from November 3rd to November 9th. I had unprotected sex on Day 13 and 17 of my cycle but I know he didn’t cum in me, he pulled out. But I did not take a plan b and am not on birth control. I took a test on December 1st and it came back negative. I’m extremely depressed, stressed, and anxious to the thought that I may be pregnant so I don’t know if my period is just late from that or I really am pregnant.