To test or not to test?

Amanda
I'm five days before I expect AF. I've had some symptoms that I feel could be pregnancy - related (I haven't had any PMS symptoms for 6 months or more with AF), so I'm thinking there is a chance I could be pregnant. I'm really anxious to take a test, but I would really like to know if I'm pregnant. I bought some First Response tests, should I take one in the morning or wait and see if AF shows?