2ww / implantation!

10 dpo I started cramping and had  pink creamy cm when I used the bathroom. Cramped for about 2 days and now it stopped. Thought it was AF Early but nothing  since yesterday and today. I'm loosing my mind cause all HPT are negative. AF is due 5/31. Anyone else had a BFP after this? How soon can I test and get a real answer? Implantation bleeding with cramps?