Having an anterior placenta, which means it is positioned towards the front of the uterus, is quite common during pregnancy. As for the distance between your placenta and the internal OS (opening of the cervix), being 2.35 cm away is generally considered normal at this stage of pregnancy. A low-lying placenta is typically defined as one that covers or partially covers the cervix, which does not seem to be the case in your situation.
It's important to note that every pregnancy is unique, so it's always best to consult with your healthcare provider for personalized advice based on your specific circumstances.
Regarding physical activities like walking and exercises, unless you have been advised otherwise by your healthcare provider due to any specific complications or risks associated with your pregnancy, it should be safe for you to continue these activities. Walking is generally recommended as a low-impact exercise during pregnancy as it helps maintain overall fitness levels and promotes circulation.
However, if you experience any discomfort or pain while engaging in physical activity, especially around the area where your placenta is located, it's advisable to stop and consult with your healthcare provider. They will be able to assess your situation more accurately and provide guidance tailored to your individual needs.
Remember that maintaining a healthy lifestyle during pregnancy includes regular exercise but also listening to your body's signals and seeking professional advice when needed.