u/ApprehensiveElk4006

I did a workout today on the bike and felt fine all the time. It lasted one hour and when I got in the shower I saw my shorts some brownish colour. It wasn’t much on the paper but there’s still some and I have not much, but some cramp. Like 0,5 on the scale.

Is this normal? I had the IUD inserted 3-4 weeks ago.

Thank you in advance.