The cramping stopped so I'm going to time the next cramping. This is my second pregnancy but its been 11 yrs and with him my water broke at 32 wks. So this is all new to me
yes the pains in your legs are most probably from babies head moving on your pelvic floor muscles, see if there is any pattern to your cramping, if so see if you can start to time them
You can always call L&D and let them know what's going on, if they think it's something to check out, they'll ask you to come in. I got a lot of pains in my legs toward the end, but menstrual like cramping sounds like contractions, try to keep track of how often you're getting them.