I'm not a doctor either. I have wrist pain from the outside wrist bone up the outside of my arm. Tingles and pain. Because it originated at work, I went to a wrist specialist for workman's comp. It wasn't carpal tunnel. After six months of trying to just treat the pain I was sent to an outside wrist specialist. He said he could feel what was wrong with my wrists but didn't know what is was.
I finally got off of workman's comp. Found the only thing to do was to avoid everything that caused the pain.
Four years later my supervisor wanted me to get my wrists checked again. (long story). This time they brought a wrist specialist up from the Big City. That wonderful doctor did all sorts of measurements, checked lots of things about my wrist.
The diagnosis (after 15 years of dealing with wrist pain) is the angle of my inner and outer wrist is off. Most people have a 30% angle between inner and outer wrist bones. This spreads the "load" on your wrist across the entire wrist.
My wrist has no angle. Because of that, all the load is on the outside wrist bone.
The interesting part is that this is a "variation of normal." Meaning that it occurs so much that it is just another way for the wrist to be structured.
Definitely see a doctor. If they're saying it's tendonitis, do the treatment. After six months and still having pain, I would request a wrist specialist. Unfortunately for me it took three specialists. If your specialist measure your wrists in several positions and angles, you've got a good one!