Help please

Ericha

I had MC at 5 weeks and 4days. On July 2 my levels were at a 5 and July 6 a 0. My doctor told me to go ahead an keep trying no need to wait. I got my positive on 16 and 17. 5 dpo I started cramping in my legs like my period was coming. Now it's dpo 7 and still cramping in legs and pain in back. My whole body is light aches. Has anyone experience cramps in legs and body aches a week before their cycle? I'm due August 29th( I'm usually 28days). I usually get leg cramps the day before or day of my cycle.