That used to be my constant aggravation too. Swings/snatches combined with sitting at a desk and stress tension. Traps and rhomboids or whatever else is in those regions.
You may find a stretch that helps. I sometimes use a massage stick wedged in the back of a chair to roll over the traps. But this is treating symptoms and not resolving root causes. It could be just overtraining. Your training load is exceeding your recovery capacity. Maybe add another rest day or two. You might actually make better progress that way. Or get more intent with recovery itself -- 8 hours of quality sleep, great nutrition, maybe some of those other cool things like cold plunges (I don't do that myself).
Some other ideas: When you stretch, think about relaxing rather than stretching. Use long exhales. Sometimes just the breathing exercises can help. Crocodile breathing, focus on full relaxation of all the upper back and chest muscles. If your girlfriend is willing to massage your shoulders that can help a lot too. It seems to melt away tension. Some other good ideas in this video:
Fascia release can be helpful too.