Missed period bad cramping/back pain

Hey guys, I was due for af on the 18th, so today would be 3 days late. This isn’t usual for me so I’m suspecting I may be pregnant, I’m also having pretty bad pain in my lower back that kind of feels like it’s reaching around to my lower abdomen on the right and left side, I was wondering if this is a normal thing in early pregnancy? What do you ladies think.