Conceiving

here's a question... did you know exactly when you conceived? and if so how long after did you know? My husband and I got married in August the 26th and we are gonna start trying to get pregnant on our honey moon in November, but i think we may have conceived. I'm ovulating right now and Friday we had sex multiple times. after we were done I felt super weird and yesterday and today I'm so sick and I am not the type to get sick. My thing is I don't know if it's my anxiety because we were trying to wait till November or if I'm pregnant. Please help