Nexplanon & cramping no period

Val

My last period was August 3rd and I got Nexplanon in August 28 before I started my next period (Sept. 3) and I have been having cramps for a whole week as if I’m going to start my period and nothingggg! The cramps are a little worse than my normal period cramps. Has anyone else experienced this? I did test negative for the pregnancy test that day I got it in. Helppppp pleaseee