Braxton Hicks at 16 weeks??

Ladies, I need help and I’m waiting for a call back from my OB but I need some insight ASAP.

16+1 today and I’m 99.999% sure I’m having Braxton Hicks contractions. They feel like period cramps, mild, but had a pretty strong one earlier around 12:20pm-ish.

I am VERY well hydrated, my electrolytes are in check (I originally had some leg cramps so I’ve been really good about electrolytes). I was cramping all day yesterday and figured this was maybe my body’s way of telling me my electrolytes are off, but it’s continuing today and it’s starting to freak me out.

Anyone have any insight? Is what I’m feeling (potentially) BH? This early? First pregnancy that’s made it this far, 3rd pregnancy overall. Any help would be so appreciated I just hope my doctors office calls me back soon it’s been almost 2 hours with no return phone call 😭 I’m getting worried.