When should I test?

So Sunday- Tuesday (cycle days 21-23) I had some pretty noticeable cramping, but nothing awfully painful. It's odd for me because I usually don't cramp until the second day of my period. Wednesday afternoon all day yesterday and now this morning (cycle day 24-26) I've been spotting. It's just slightly brown when I wipe. Last night it got a little heavier and started to look slightly pink. I filled expected to wake up this morning with actual bleeding. Again it was just a light brown. I had implantation bleeding with my 3rd baby, but it was only twice for one day when I wiped. I then was in denial and waited over a week to test lol. If this is implantation bleeding this time is it likely that it happened when I was cramping so I might get a bfp?