What are you doing body??!

I'm always regular with my periods but this month I'm two days late. I'm 14 dpo and I took a pregnancy test this morning but it was negative. I've also been having cramps on and off since last night whereas normally I only have cramps after I've actually started bleeding and only for about an hour. I'm really confused as my period shows no signs of showing up. Has anyone experienced anything similar? Just need some peace of mind. Thank you