About a month ago I got a little sinus cold, which I thought was strange since its summer in Florida and no one else around me was sick...During that time I had some cramping/pressure but no bleeding and nausea that lasted all day for about 3 days straight. My period showed up about 4 days later but it wasn't normal.. it lasted about 4 days and not the typical 7 and it was not as heavy. It also showed up 3 days earlier than normal. I kind of dismissed it and moved on thinking okay I got it so I am not pregnant. Well this month my period came a few days early again and was very short again, not as heavy but still had one day of real heavy flow. That was almost 2 weeks ago and a few days ago I went to the bathroom and noticed brown discharge, probably about a teaspoon worth, only the one time though. I woke up yesterday with pressure and cramping in my abdomen and its not severe but I can feel it still. I am not sure if this all means signs of pregnancy or if I am thinking too far into it, especially watching "i didn't know i was pregnant" haha. I have also been extremely exhausted, headaches and moody but I work a full time job and a part time job so I chalked that up to that and not anything else. Last night, I experienced severe pain on my back that lasted about 10 minutes, not followed by blood or painful anything. Just a shooting pain in my back. I am not sure if it was needing to use the restroom or sitting the car too long or if this is another sign???