Thanks for the query to H.C.M. Forum.
Since pain in the shoulder joint is from one year.
May be due to disease ( infection ) in the head of humerus
May be due to deltoid muscles sprain
( chronic ) as from stress
of force during movement of shoulder joint one year back.
Pain in lymph node and enlargement may be due to infection in breast as these lymph node drains lymph from breast and its tail lies in axilla
Consult an Orthopaedician for shoulder joint and surgeon for breast examination.