Weird period??

I guess tmi idk, well normally my period starts the 24-27 and last 8 days. Well for the past three months it's been on the 30/31. And only last 3-6 days. Well I'm at the beach and I'm in the bath and I realized I started my period. Well it's the 26th so no problem right? But I normally have REALLY bad cramps. Like They make me pass out and they come like a day early or on the day. But I've had zero cramps at all. So I don't really know if that's normal??