shedding 😳 please help

So I have to know! It's been bugging me for alittle while and I never had the chance to tell nor talk about it but thanks to this handy app I can, with out feeling so revealing I suppose, But to the question! Okay so we all know your period is the shedding of the lining of your vagina I swear I can sometimes feel when it sheds like its a slight pain on the inside of my leg and side is this normal or am I just tripping 😳 please some one help me!