Pains in lower Abdominal after walking for a bit

I’m 25 weeks tomorrow and since Thursday evening I’ve started experiencing abdominal pain/pressure like. I cleaned house that day for a couple hours so i just figured i did too much. Well since then once I’m up and moving around after while it comes back. It’s not excruciating pain or even painful to where i can’t walk at all so i haven’t gone to hospital. But I’ve been taking more break during the day to try and subside it a bit. I called my doctors today but they are closed due to the tropical storm that came through here last night ( i live in Florida) so I’m waiting to call again tomorrow. Just wondering if anyone else has been experiencing the same as me?