3 days late and FREAKING OUT! 😖

Ok, so: I had sex on my fertil week but we used a condom and my sexbuddy didn't even came inside me (precisely because of the condom and the discomfort he felt with it). What are the chances that I got pregnant like this?!?! I'm 3 days late now and I have my final graduation project  presentation in two weeks, so I'm too scared to take a pregnancy test and find out it is positive, because I will be in no mental and emotional conditions to finish my project 😖😱😫😭
Please tell me is absolutely impossible getting pregnant when you use a condom!? I think if the condom had broken we would have noticed, right?!?! Helppp 
(Sorry for bad english, it's not my native language)