When did you find out you were pregnant?

I didnt know I was pregnant until I was almost 18 weeks. I've never had normal periods and because of that I thought I couldn't get pregnant so I didn't think nothing of it when I wasnt getting mine for months. I was living my life working nights , going to school during the day , getting like 3 hours of sleep, I even took a trip out of the country and didn't suspect a thing. One day my belly looked a little too pudgy so I decided I was going to to work out hard on my abs but one morning out of nowhere some gut feeling told me to take a test just to make sure I wasn't pregnant so I wouldn't hurt the baby. So I did, I was barely paying any attention to that test until I looked and seen those double lines I almost had a heart attack lol. I didn't know what to feel and I didn't believe it so I took 4 more tests and they all came out positive. I went to the doctor and got scolded for not coming sooner and found out it was a healthy baby boy 😍.