Just to let you know that when I had my lip biopsy a couple of years ago, during the op, didn't feel a thing. You do know that the wound is healing when the stitches get tighter. The stitches used are self dissolving and in fact you can help yourself in removing them when they start to come loose. Weight gain can be a problem until the meds kick in and you help yourself with doing as much as you possibly can, even if you have no energy. Having support from family and friends is to me, the most important thing.
Reading your message it looks as if you are getting help with Sjogrens from various specialists. What I have learned so far is to speak your mind and if you think you're not being taken seriously, let that person know how you feel. As you say, you are reading and learning more and more. Keep reading - there is so much important information out there. Good luck with your biopsy. All the best, Gina