So I have never been pregnant before and I don’t really know what the signs are. My fiancé and I had sex the day before I started my period, so I did have a full 5 day period. The blood was dark though on the last few days, which isn’t normal. I’ve been getting super light headed today and yesterday, and I’ve been having stabbing pains in my back and lower stomach. I’ve also been nonstop nauseous and tired all of the time. It would only be a week though so I don’t feel like I would have these symptoms so soon?