Is this normal?? is it dangerous??

Marlene

Every time i go for a walk, even a brisk walk i get like a pressure on my abdomen where the baby is (i assume). Im 27 weeks and have been mostlyy sedentary through the pregnancy (bad i know) but this kinda worries me. It doesnt seem to critical or dangerous but its still very much bothersome. Have any of you gone through this or currently going through it as well? What can be the cause?