When did blood test come back positive?

Re
For any of you who had a positive blood test, how many dpo were you when something showed up? I had really bad abd pain on Friday and have a history of ectopic pregnancy, so I'm having blood test done tmr, but AF isn't due til 4/29 so I'm skeptical anything will show up yet. Not entirely sure what day I ovulated but I think around the 15th which would make me 10dpo now.