Sex and worries

My boyfriend and I had sex almost 3 weeks ago, he wore a condom and pulled out before he finished.

I then had the week of the flu, a week of terrible anxiety & sleep and now my mum is neglecting me at home because she cannot handle my anxiety and depression problems anymore.

The point of this post is could I be pregnant or have I just gained some wait due to bad sleep and stress?

Please keep in mind that I am a big over thinker and under a lot of stress right now ❤️