Yes, you can take a blood test tomorrow to confirm if you are pregnant. Blood tests are more accurate than urine tests and can detect pregnancy earlier. However, it is important to note that it may still be too early to get an accurate result, as it takes time for the fertilized egg to implant in the uterus and for the body to start producing enough hCG hormone for detection. It is recommended to wait at least one week after a missed period for more reliable results. If you are experiencing any symptoms of pregnancy or have concerns, it is best to consult with your healthcare provider for further guidance.