You aren't lazy lah! You’re literally growing a human. It’s completely normal to feel what you’re feeling.. if your body is telling you to sit down or nap, listen to it.
If your calves are sore, compression socks can be a game-changer for that heavy, achy feeling.
If the soreness comes with sudden swelling in just one leg, redness, or heat, definitely call your doctor right away just to be safe ya