Am I going to miscarry ?

I’m 6w5d and have been cramping since I found out I was pregnant at 3w5d .. all day everyday it’s just constant pressure feeling in my pelvic/uterus area and then I have some cramping. I had an early scan at 5w5d but we didn’t see the fetal pole yet it was most likely too early the doctor said. My thing is if these cramps and aching pains were from an impending miscarriage wouldn’t it have happened already? It’s been 3 weeks ..