I ended up going back to the doctor who has prescribed me a two week course of naproxen which is supposed to reduce pain and swelling, let's hope it helps!
The main presentation of the syndrome is significant, acute pain in the chest, along with tenderness and some swelling of the cartilages affected, which is commonly palpable on examination. Perceived pain is often exacerbated with respiration, although many times it can be extremely painful, to the point of being debilitating.
Illustration By Henry Vandyke Carter - Henry Gray (1918) Anatomy of the Human Body
The reason I started this post with "cancer is the gift that keeps on giving" is because I have found out:
Patients who have had radiation therapy to the chest/breast will often experience this syndrome which can occur shortly after therapy or years later
Thanks universe, I must have been a right shit in a past life....