I thought I had implantation bleeding on the 17th...no bleeding since but I've been having these cramps on and off for about 2 days now. They're not unbearable just a bit annoying. I tested yesterday evening and it was negative. Can the cramping mean AF is coming? My cramps are usually more intense. How long after implantation bleeding should I wait to test. I felt like I was testing too early but I was so impatient. I hate the tww period...ugh! Any advice?