30 weeks and lots of cramping

A

I’ll be 30 weeks tomorrow and today I’m having some pretty intense back pain for the first time. I do stand for about 6 hours at my job (I sit when I can) and I’ve only been getting 4 hours of sleep on average at night, which probably doesn’t help, but my back is really bothering me all of a sudden and I’ve started getting period like cramps pretty frequently.

I know back pain is normal, but is it normal to feel like I’m having menstrual cramps pretty often? They’re not super painful or anything, mostly just mild, but fairly frequent. I’m just not sure what to expect Braxton Hicks to feel like, but I’m not really getting any actual tightening, just crampy.