Preganant?

Taking a test in about a week. I would be 3 wks 5 days. Symptoms; Yesterday evening and all day today (until now) I've had discomfort in my sides and lower back that feel like the stretching feeling you get when you just finished crunches, migraines(which are rare for me), extreme fatigue which is very unusual for me! Any thoughts? Could I just be qsyching myself out? Help! I think I may be too hopeful....