Mucousy Period Blood Period Question? It's Strange, But It's Like I Have A Thick Clot Of Mucous Preventing Blood Flow?

Period question? It's strange, but it's like I have a thick clot of mucous preventing blood flow? - mucousy period blood

There is always a clot slimy thick red substance that prevents blood from spilling on the pad and out very easily when I'm sitting on the toilet. I sometimes run with blood, but my time is very small and isolated because of the mucosa.
Is this normal ... Is it permanent?