For what it is worth, hopefully to save you some trouble it could be several things all of which require some diligence on your part to resolve and not blindly going to thursday's workout because it is "shoulder day".
Impingement means there is insufficient room between your humeral head and acromion, the bursa and tendons get smushed up in there causing irritation and inflammation. Could be genetic, depending on your shoulder anatomy. Pesonally, I can no longer perform upright rows with a barbell but can clean a barbell or do high pulls with a heavy DB of kettlebell. an X ray is the only way to determine what kind of anatomical room you have inside. Avoid exercises that hurt. Generally internally rotated and elevated exercises like upright rows and "pouring the water" on dumbbell lateral raises. try not to do anything overhead.
Inflammation. the shoulder capsule could be inflamed, causing swelling. The swelling if temporary/acute will reside eventually by giving yourself a break and not training shoulders directly. And yes this means taking a break from benching your ass off. The inflammation itself could be contributing to the impingement/pain because the capsule has gotten so much larger than normal. There are several exercises you can do besides the broomstick/circumduction, expecially not this particular exercise. Use therabands and just work range of motion without pain. when it feels better, you can add some more extreme range of motions like that.
Rotator cuff tendonitis. Inflammation of the tendons. they get little blood supply. they grow slower than the superficial muscles (delts) and connecting muscles (SITS). chronic tendonitis can lead to tendonosis = basically tendon death/detachment. Fix it now by giving yourself a rest, enjoy the holidays, and when you come back consider a more general program for the rest/whole body with a focus on correcting your possible shoulder musculature.
Bicepital tendonitis. the biceps tendon rides in a humeral groove at the top of the humerus and can also get inflamed from excessive use. another reason to possibly take a break.
-rest take a break from heavy lifting (except legs and maybe arms)
-focus on rotator cuff strengthing
-seriously stretch your possibly tight superficial muscles like lats and pecs that internally rotate your humerus
-do some specific shoulder mobility stretching/range of motion improvement exercise
-see your PT on schedule or earlier. February is unacceptable. Greater than 10 days is unacceptable.
I am not a physical therapist. I am not a doctor. I am just someone who has suffered from shoulder pain a lot as an adult, for what it is worth and I am sure there are several REALLY SMART PEOPLE on this site who can help more, but your doctor and physical therapists are your best bet.