Yes, it is quite common to experience Braxton Hicks contractions during the second trimester of pregnancy. These contractions are usually painless and sporadic, often described as a tightening or squeezing sensation in the abdomen. They are considered a normal part of pregnancy and are your body's way of preparing for labor. While they can be more noticeable in subsequent pregnancies, some women may start feeling them earlier in their first pregnancy as well. It is important to note that if you experience frequent or intense contractions accompanied by other symptoms like vaginal bleeding or lower back pain, you should contact your healthcare provider to rule out preterm labor. Otherwise, try changing positions, drinking water, or taking a warm bath to alleviate any discomfort caused by Braxton Hicks contractions.