So I've been having cramps since the 13th. Like it feels like I'm on my period, but I'm not. I'm already 5 days late. What's going on? I'm not pregnant because I took two tests and they both came out negative. Haven't been stressing much lately. Just kind of chilling so I don't think it's stress. And I've actually been eating healthier because I have symptomatic gallstones so it's not my diet either. Help please.