Always easily tired and pelvic pain when going out

Im currently 17 weeks. I realised that i always get very tired easily when going out, and when i walk a distance, my baby bump (even when its very small) will feel heavy(?), hard(?), and sometimes slight pain, around below the baby bump. I always find it uncomfortable when going out, walking around. I will usually need to sit every now and then. Do note that i only have a small bump but it feels like i already feel the heaviness of the baby if that makes sense. Is it normal? Sometimes i miss my old self whereby i can walk around for hours. #advicepls #firstbaby #firstmom