How soon after ovulaton did u get a bfp?

I think I am 7dpo because last sat I had some mild cramping in my left side like i seem to every month and I had earlier that night. I am trying so hard to wait to take a test its just so hard. Symptoms started about 2 days ago, nothing serious just a lil more tired, thirsty and yesturday I had a small amount of pinkish brown spotting/discharge when I wiped but nothing since. My started feeling achy and full today and I don't think my af is due till oct 24. Hope I get a bfp just wanting to know when I should test.