Do answer your two questions, it's best to test the day after your missed period....the chances of oversaturating a test are very low, but if you are worried about, pee in a cup then stick the wick of the test into the cup and watch until you see the fluid and the color of the test dye moving across the window, then pull the stick out and lay it flat and wait the proper amount of time per the directions.
Good morning ;) I really doubt that it was. Ovulating 6 days before AF is actually not good for being able to get pregnant. It's called a luteal phase defect. 6 days is not long enough for am egg & sperm "if" they met up to travel down one of your tubes & implant in your uterus. Doesn't mean that it's impossible I suppose, but highly unlikely.
How long are your cycles? You "should" have a minimum of 10 days between ovulation & AF. Really thats actually a not even very much time, ideally you should have between 12-16 days in between.
It's a super easy thing to fix, so it doesn't mean you can't ever get pg, but it's something you do need to correct if your gonna try.
Best of luck ;o)