Period Clots/Stinging Tailbone Pain

Hey ladies! I've been dealing with period clots and stinging tailbone pain for a while now...

The clots I get are quite large and occur 4/5 days I'm on my period...

Along with that, I get a very painful stinging in my tailbone that comes out of nowhere during my period (occasionally outside of my period as well). It hurts to the point where I feel almost paralyzed, but it lasts for maybe a minute or so, then it's gone.

Does anyone else experience this? If so, do you have any input? I've already booked an appointment with my doc, but it won't be for awhile, sadly. :(