I was suppose to start my period on the 25th, but it never came & it is now it's the 27th. I've been having cramping, mood swings, bloating, back pain (which it could be from having my first child) but also I'm very tired during the day's, head aches, cravings for pickles, gas. I don't know if it could be from stress or if I could actually be pregnant? Someone please help!