My last period was Feb. 27. I have a regular cycle (generally 28-30 days long). I'm not on cycle day 33- no sign of AF. I've had minor cramping for about 4 days now. It felt like I was going to get my period on cycle day 30- but the cramping stopped and no period showed up! I tested once on Monday night- BFN. I tested once this morning- BFN once again. Help! Is there a chance I could still be pregnant??