Waiting for af....

So my period was supposed to arrive today and I don’t feel it coming at all like I normally would. I had some mild cramping yesterday and on and off Saturday and Sunday a little bit. It was mild and nothing like what I usually get right before my period. Now day of period I have barely any cramping it’s more so like a heavy feeling super bloated and back pain nothing else and very hungry. I’ve been taking tests and they all come back negative so am I out for this month or is there still hope? Has anyone ever experienced anything like this and been pregnant?