Welcome at HCM.
At present you are having pain at your tail bone reason,you are also having frequent blood in stool
.The chordoma is one of last diagnosis ,which can be assessed in person having such problems.Looking at your details i will advice you to get checke from a general or ano rectal surgeon first.It looks that you may have hemorrhoids or piles which may be the reason for pain as well as blood in stool.
If it comes negative then you should get evaluated completely with help of MRI
At present you may have a good analgesic
or aleeve for relief.
Hope this will help you.
With best wishes.