Pregnancy question please :) ?

My doctor is on vacation and I have some questions I don't want to wait to ask until tuesday! My husband and I are trying to conceive and we started taking clomid because I was not ovulating. Day one was june 12th, I took the pill days 3 thru 7 of cycle, my fertile day was day 14 june 25. We had sex the 24th late at night, I am due between the 9th and 12th of july as clomid may have altered the days of my cycle. When can I take a test that will be accurate? I don't go back to dr for bloodwork until mid july on my second session of clomid. :) thanks in advance!