Dear bikelet,
It would indeed appear to be tight pecs from your desciption, but which pecs? Most treat the pec major, which I find less of a problem than pec minor. The pec minor acts in a more positional manner and are a greater distorter in that they try to hold a position.
You can find these on an muscular chart. Try treating these with your massage and trigger point therapy and see if this brings greater results.
Then you might consider checking out the serr ant. However, you will need someoneelse to treat this one.
Another one that is often missed is the levator scapula on the side of the raised shoulder.
Best regards,
Neuromuscular