So much stress and late period

So I am 22 and in a long term relationship, but recently we have been having problems and it's causing me so much stress and anxiety. We have has sex once with a condom since my last period I also am not on the pill, now I'm almost two weeks late but experansing all of the physical symptoms. I know it's super unlikely that I am pregnant but it's just making me more stress. Can anyone please give me advice??