Not sure if it Sjogrens but extremely dry eyes, mouth, skin

So here is the deal: Ive had dry eyes for years, but not severe until this year (Im 58) Now Im waking up at night having to use eye drops several times, not to mention all day. Am also trying Restasis. Also
in the last 4 months very dry mouth especially at night. Am on thyroid meds and an antidepressant (both for years) My skin is also suddenly dryer than its ever been and Ive always had dry skin
Did all the Sjogrens blood work, all negative
my ophthalmologist wants me to do the salivary but my oral surgeon says it is not definitive so why do it?
No joint swelling...Im very active, Yoga, Pilates etc
Any suggestions? Do the biopsy? Do I live with it for now and wait for symptoms to present? Even if it is Sjogrens, what treatment would there be if Im not dealing with joint pain?

thank you so much
I don't feel a burning need for diagnosis as the treatment at this point would be the same one way or the other. You confirmed for me what I was thinking.

What type doctor have you seen, such as a RA doctor? You might want to get a consult with an RA doctor to see if he/she thinks it's Sjogren's you have, a lip biopsy can be painful (it was very painful for me as doctor took 3 biopsies) and it then just depends on the reporting tech, mine said not inflammed enough, which was shocking to both the ENT (who took the biopsy) and my RA doctor who said I did have sjogren's.
You can try mouth care items like biotene at night, warm water compresses along with eye drops and check with your eye doctor if eye plugs would help, (read the eye plug post on here). Plus a RA doctor might also possibly add Plaquernil medication for you to try or another medication. Sjogrens is an autoimmune disease and many RA doctor do treat this disease. RA doctor do not do the biopsy, a good ENT (Ears, nose, throat doctor) will do the biopsy.
Get back into your eye doctor and ask him or her if this is sjogrens as well and get treatments started for the dry eye's if the dry eyes get worse the eye doctor can try eye plugs, chronic dry eyes is bad and can cause eye infections, I have a antibotic eye ointment, steroid eye drops, many many eye drops such as Blink, GenTeal and Restasis eye drops to name some, I've also used Sustane eye drops and some gel drops along with warm compresses and eye plugs last year I had upper and lower lids plugs which finally helped me. Later on I even had to have the upper eye plug removed because I was having tears all the time. I also had in 2006 3 eye surgeries on my left eye which probably worsened my condition.
Hope some of this info helps and many well wishes to you.