What Is Going On?!

So I’m 10 days late on my period. I took a test Friday night and Sunday morning both were negative. I have back pain, mild cramping but feels like the cramping is in my lower back, headaches, extreme nausea and am very tired. all I want to do is sleep 💤 certain smells make me more nauseous now. I keep having this feeling of “wetness” down there so I go to the bathroom thinking I started my period. Nope. Just clear discharge (sometimes white/clear) anyone have any idea what it could be? Waiting till I hit 14 days late to call the doctor. Any chance I could actually be pregnant without it showing up on a test yet?? Help!