It is possible that you could be pregnant based on the symptoms you described. A shorter and lighter period than usual, along with lower back pain and spotting, can sometimes indicate pregnancy. However, it's important to note that these symptoms can also be caused by other factors such as hormonal changes or stress. The best way to confirm whether or not you are pregnant is through a blood test, as this provides more accurate results than a home pregnancy test. It's understandable that waiting for the results can be stressful, but try to remain patient until you receive them. If the blood test confirms your pregnancy, make sure to schedule an appointment with your doctor to discuss further steps and prenatal care options.