Idk what is going on

On the 19th of July I had unprotected sex, then the 22nd I had ovulation spotting. Well this past Sunday I was spotting again with light cramps(only lasted an hour and cramps left the same time) then today I was spotting for about an hour too with light cramps that stop once spotting did. Twins do run in our family.

Edit to add* I have taken test, and all been a bfn