It is possible that you are in early labor based on the symptoms you described. The combination of horrible cramping, light bleeding, bad lower back pain, and being 3 cm dilated suggests that your body may be preparing for childbirth. However, it's important to note that every pregnancy is different, and these symptoms can vary from person to person. It would be best to contact your healthcare provider immediately to discuss your symptoms and get their professional opinion. They will be able to provide guidance on whether you should go to the hospital or continue monitoring your symptoms at home. Remember, they are there to support you throughout this process and ensure the safety of both you and your baby.