Right shoulder blade pain radiating to triceps and forearm after strength training

Hi everyone,
I’m a 48-year-old cyclist. About a week ago, the day after a strength workout (plank shoulder taps, overhead press and bent-over rows), I developed pain on the upper inner border of my right shoulder blade.
Since then:
Pain radiates into my right triceps and sometimes my forearm.
Banded field goals relieve it temporarily, but it returns within 5–15 minutes of standing.
Supporting my right elbow or lying on my right side reduces the pain.
Massage helps temporarily.
I had multiple cervical disc bulges on an MRI in 2020 but haven’t had new imaging yet.
I don’t have obvious arm weakness or numbness.
Has anyone experienced something similar? Was it ultimately diagnosed as a rhomboid/levator scapulae issue, scapular dyskinesis, or cervical radiculopathy? What helped the most?