I think I might be pregnant, but I'm not sure. My boyfriend and I have been having unprotected sex because I was going through a transition of having to gain weight back, and my last period was around/before New Year's. It was a week late and very heavy. For the past week or so, I've noticed small changes. Symptoms include hot flashes, trouble sleeping through the night, weird taste in my mouth, frequent urination, some slight tenderness in my breasts but mostly they seem larger, and loss of appetite then some cravings later (mostly for sweet and salty foods), and very intense mood swings.