It is possible that you are pregnant based on the symptoms you described. The timing of your period being lighter than usual and coming earlier could indicate implantation bleeding - a common early sign of pregnancy. Cramping can also occur as the uterus adjusts to the growing embryo. Backache is another common symptom due to hormonal changes affecting ligaments and muscles. Feeling exhausted and having increased appetite are also typical signs of pregnancy caused by hormonal shifts and increased energy needs for fetal development.
To confirm your pregnancy, it's recommended to take a home pregnancy test or visit a healthcare professional for a blood test. Home tests can usually detect pregnancy hormones in urine around the time your next period is due or shortly after implantation bleeding occurs.
Remember that every woman's experience with early pregnancy symptoms can vary, so it's important not to rely solely on symptoms alone for confirmation. If you suspect you may be pregnant or have concerns about your health, consult with a healthcare provider for proper evaluation and guidance.