Braxton hicks?

First time pregnant and 26 weeks along. I think I'm having braxton hicks but really don't know what to feel for. I feel a little tightness in my lower abdomen/waist. And it kinda goes up to where my belly button is. I've felt them for a a couple weeks but they are a bit stronger now...not hurting, but uncomfortable. I know they are normal, just wanted to see if what I'm feeling is BH?? That way I don't look like a fool at my doctors appointment when I tell him I think I'm having them lol.