Tested 4 days before period!?!

Megan

So I get ovulation pains and I know I ovulated the night of July 31st. So that puts me at 11dpo. I’ve been pregnant several times due to miscarriages and I have two kids. I’m impatient and have NEVER gotten a positive until like 4 days after missed period. Am I crazy or did I make a mistake getting the cheap pregnancy tests!???