How soon did you realize you were pregnant??

So I'm a week late. My boyfriend thinks I could be pregnant... But I SWEAR I would know. I've never been pregnant before but I feel like I would feel different (I'm SUPER in tune with my body and tend to notice any slight changes, no matter how subtle). My periods have just now regulated to the point of usually having a period at the same time each month (usually varying no more than 5 days, I'm in my early 30s).... But I've been stressed and know that affects my cycle too. I usually log my sexual activity but I didnt this month (go figure)...but I am almost 99% sure we didn't have sex on my fertile days...

Anyway.... I refuse to take a pregnancy test, just to end up bleeding while peeing on the stick (yes, this has happened years ago)....

My question is... How soon did you know you were pregnant? (Just for my future reference).... And how did you know?