Been there, done that, both of you (R. shoulder separation in 1972, L. clavicle fracture in 1976, both from cycling). Above all else, you need to consult an orthopedist like mine: conservative (as opposed to knife-happy) and sports-minded.
My shoulder separation healed after a week or two of rest and partial immobilization (arm in a sling), and I have had almost no aftereffects whatsoever. ("Third degree" sounds ominous, however, so your healing time may differ.)
I wore a butterfly strap over the clavicle for 2.5 weeks, at which point they declared me healed. I have a palpable lump at each of the two former break points, and my left shoulder span is now several mm shorter than my right, but I have no other aftereffects.
Both of you have my sympathy and genuine empathy. Get well soon, S'girl!
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069