Could signs of pregnancy include having excessive burping in addition to tenderness breasts and a very light period for last 2 cycles even if your tubes have been tied about two half year?

The symptoms you have experienced, which include excessive burping, breast tenderness, and light periods, do not necessarily indicate pregnancy. Tying your fallopian tubes is a highly effective method of contraception, and it's unlikely that you are pregnant if your tubes have been tied for approximately half a year.

Excessive burping can occur for various reasons, such as diet, certain medical conditions, or anxiety. Breast tenderness and light periods can also be caused by hormonal fluctuations, which can be influenced by factors such as stress, lifestyle changes, or certain medications.

If you're concerned about the possibility of pregnancy or have any questions or concerns about your symptoms, it's important to consult a healthcare professional. They can provide an accurate diagnosis and guidance based on your medical history and examination.

As for the effectiveness of tubal ligation, some studies report a very small chance of pregnancy even after the procedure, although the risk is significantly reduced. It's essential to discuss the success rate and potential complications with your doctor to make informed decisions about contraception and your overall reproductive health.