*Geographic tongue--you have a textbook example of it (do a Google search if you're curious)
*Mucus in stool
*Nerve problems (that's the tingling and vibrating you feel)
Sores on fingers
All of the symptoms I put a star next to are ones that are known to be highly correlated with Celiac. You will find people on here who have those same symptoms. The only thing I don't know about is the sores on your fingers. They could very well be related, I just have never seen that before.
Your negative blood test, as you seem to know, doesn't mean much. Plenty of people text negative and go on to end up having Celiac anyway. You need to bring this up at your next doctor's appointment (make one now if you don't have one coming up). If your doctor doesn't want to do a biopsy, find another doctor who will.
It's important to remind you, though, that even if you suspect Celiac (I do, from the little I know), you must continue eating a high-gluten diet until after your testing is finished. If they do a biopsy they'll be looking for villi damage, which they won't necessarily find if you stop eating gluten and your villi begin to grow back.