Pregnant?

So me and my bf have been ttc for a few weeks now. Last month i had a really irregular period. I normally last 4 days (even when I am stressed it has not lasted longer than 4 days in almost a year), last month it lasted 6. My period was supposed to start today (11/4/14) and it hasnt. I have found myself to be exhusted and really irritable the last week or 2. Feeling mild cramping, generalized body aches, headach, and my breast are slightly tender. Not sure if it's just my body playing tricks or not? Haven't gotten a test yet.