some ladies get a bfp quite quick while others don't get one right away I would say to be on the safe side to wait till you were officially late for your period before I tested,how ever sometimes the wait is to difficult and some ladies go ahead and test so maybe you could get a mutli pack of test...
good luck to you and best wishes...

__________________
The day you deliver, outside will be slightly overcast. Your baby will arrive in the evening.
After a labor lasting approximately 8 hours, your child, a girl, will be born. Your baby will weigh about 8 pounds, 3 ounces, and will be 19-1/2 inches long. This child will have green eyes and a lot of hair.