When is the best time to take a pregnancy test?

I had my last period April 26th- 30th and missed mays. I spotted June 3rd (a very, very inconsistent light trickle that lasted less than 24hrs). I do have some common symptoms, but I’ve taken two tests, and both had very, very light lines where you need bright light and to really study them, to see it. My ob won’t see me until I wait another week or two and get a definite positive.