Is it normal to find out this early

I had my period on Oct 18 and on day 3 I had sex with my husband - no protection and a week later I started being unlike my self. I was getting nauseous, clutzy, extra emotional and first response website told me I still would have to wait another 3 days before I can test but I took one this morning and found the 2 positive lines.

Is it normal for me to have found out so early and experience things like this? Has anyone else experienced this?