22 dpo and negative pregnancy tests.

I took the Clearblue Digital Ovulation Tests and got the blinky smiley face on 1/18 and did <a href="https://glowing.com/glow-fertility-program">IUI</a> on 1/19. Got my period 2/3 but only lasted 2 days even know it was heavy (periods normally last 4 or more days of heavy bleeding) I took a pregnancy test today (2/10) and got a negative. Can I still be pregnant? I can't explain it but I just FEEL pregnant. I'm constantly nauseous. Anyone had this before and was pregnant? How many dpo where you before you got a positive pregnancy test? None of my doctors will do a blood test cause I can't get a positive pee test.