Nuvaring users

Anyone else experience period cramps? I had the nuvaring in before i was on it for a month then i never put it back in for a month or more and now im starting it again i put it in 4 days ago and ive been experiencing period like cramps its so annoying its in my back and mainly my thighs. Anyone else experience this? If so how long does it last or do you still experience it? I did alot of running around today too so idk if that would make it worse