Has anyone ever just known they were pregnant? I just have this feeling that I am.

My middle son i knew I was I wasn't sick but something told me to take a pregnancy test and we were actively trying then we stopped and when I took the test I thought it would be negative but nope it was positive. I didn't tell my husband i was taking the test I took it walked out of the bathroom and said I'm pregnant he dropped everything in his hands starting crying cause he was so happy! It took us a long time to get pregnant