Curious

What is the best time of day to take a pregnancy test for most accurate results??? Me and my fiance have been trying very hard to conceive for 5 months and getting no positive results yet...I've been off the birth control shot for about a year now and that is about how long it took for me to be able to get pregnant with our almost five year old after being on it for two years straight...but this last time I was on it for around four years...Dr can't even give me a straight answer ... Any input is helpful at this point...I'm anemic but take iron pills daily... Thanks