I would recommend taking one, the first sign of pregnancy is usually a missed period. It's 2 days before my period is due, just took a test and it was positive. YAY! So I would totally take a test, in the morning or after a long nap. <3 Good luck
If you are two days late, it should show up. First Response is a good one to get. It will show you before you even miss your period, and I always use that one. I've never had a false negative with it and found out with two of my four babies before I even missed my period.