Getting all the usual pms symptoms for about two weeks

Autumn Kay • ttc since 2014. had a miscarriage 7/2/16.
plus a few different ones. And a week ago I had the smallest amount of bleeding and it was an isolated incident and nothing since. Just one time when I went to the bathroom. I tested the next morning and bfn. Idk what dpo I am because I'm super irregular. Should I test again or just wait for Af to come? And if so when should I test again. It's been 7 days since the teensy spotting.