There's A Sharp Pain From My Belly Button To My

There's a sharp pain from my belly button to my vagina. It feels like a string is connecting the two and my clitorus. It lasts for a few minutes and goes away and comes back. The pain is less when I'm sitting kind of hunched over and gets much more intense if I stretch out. I've had this sensation before but this time it's more severe and longer than other times. I do have endometriosis.