I've had wrist pain that prevents me from grabbing/carrying large objects, what should I do?

Seek evaluation... This could represent a variety of ailments of varying severity. I recommend seeing an orthopedic specialist to evaluate further with more history, examination and imaging.
Splint, NSAIDS. Start with an over the counter wrist splint. Add Aspirin or alive if you can take either one. If you pain doesn't improve, changes in severity or degree or you hands gets numb, cold or changes color , get an examination by your doctor.