Cramping and lower back pain

Michelle💕 •
Last week, 7 days before AF was due, I started experiencing really bad cramps with spotting and light bleeding for 3 days. The bleeding has stopped but I have had full cramping and lower back pain. My original period was supposed to start tomorrow but I don't know if it will if the bleeding I had was a period. I go in to the doctor tomorrow to see what they say but I was wondering if anyone else has experienced this ?