parinoid

So I'm being parinoid that I'm pregnant even tho my chances are low.
I think I might just be sick but
In the middle of the night I woke up with a lump in my throat I blamed it on the late night snacking 
But it still hasn't gone away next morning like in the morning it wasn't there and then it came back but when I don't think about it , the lump is not there.
It could also just be a cold, because I was in the car and the air conditioner was on and I was shaking it was so cold I could've caught something 
I had sex June 1 and today's June 20 
He pulled out in time and no cum got in me
My period is due next week
Can someone reassure me it's all in my head and this lump feeling isint something to be worried about :(