Braxton hicks? Baby? Sooo weird...

Kayla
Ok so this happens a lot, but it just looks so weird I wanted to ask opinions. I get what feel like Braxton hicks... Stomach gets really hard on either side of my belly button, but then my belly button kind of sinks in.. It doesn't just get flat it actually looks sunken in. Any idea what this is? Just baby's placement? Braxton hicks like I think? SOO weird..