I am 19 and have been married since july, I have been having pregnancy symtems such as sore breasts,headaches,strange cravings, and nausea along with mood swings with a bit of constipation. I started my period on time which it normaly lasts about 9 days but this time it only lasted 4 days. I havent taken a test yet but am certainly going to soon. what are the odds I could be pregnant and didnt miss my monthly?