When did you know you were pregnant

Jasmine • I`m 23 years old I have 1 daughter who is 3. I`m ready for baby #2
It's been 5 years since I've pregnant and I've been trying for a while. Me and my DH has been having sex each of my fertile days this cycle and today I'm having back cramps feeling like I may be ovulating which started yesterday should I keep BD even tho we had sex yesterday