4 weeks and a day ago, my ex and I had unprotected sex but he pulled out before he started to cum. A few days later I got common pregnancy type symptoms, eg: nausea, tender breasts, fatigue, mild cramp like pain, abdominal bloating. Normally my period is heavy, lasts for 5 days and I'm always on time however, when I got what I think was my period, it was a day late, really light and lasted for 3 days. A week later, I got the symptoms back along with a few more like a bit of weight gain, weird cravings, headaches and aversion to fish (that I normally love.) Is it possible that I'm l pregnant or could I be a false alarm...