What's going on?!

Sam
Here's the deal. I'm about 4 days late with light cramping and sensative breasts for about a week and randomly a little sick to my stomach. I tested this morning and honestly thought I'd get a BFP but I didn't! It's a BFN. Not sure if it just didn't show up or what. I've never been pregnant before so I don't really know what it feels like. Any thoughts?