Pregnancy scare rn..

So my boyfriend and I had protected sex on Sunday the 6th when I was ovulating. And so I went to planned parenthood on Tuesday and got a pregnancy test which it was negative. I know it's still way too early to tell but I am getting cramps and nauseous but not throwing up at all. My stomach has been uneasy for days now. And I took a plan-b pill on Tuesday after pp. I need some adult help. I am stressing. After this I am done with doing anything. PLEASE HELP!😭😭😭😖