Bleeding on cd 17 of 28. Why?

Jaeda • Baby fever is contagious here.
Cycle day 17. I had a heated argument and felt some pain. Now, I'm bleeding, again. A gush when I push. Burgundy with clots the size of dimes. And pain at 8 on a scale of 1 to 10. Too early to conceive, yet too early for my period. The only symptom I had was a fullness in my abdomen and it's gone. Frustrated doesn't even explain this. I'm ready to say fuck it.