At my new school, our day is separated into 7 Periods (which are refered to as S1,S2... or SP1, P2 etc.). Each lesson is 45 minutes. Break (20mins) is inbetween S3 and S4 and Lunch (60 mins) is inbetween S5 and S6.
In S5 ( just before lunch around 12.30) yesterday , a new symptom occurred in my shoulder. It felt like a burst and then snap sensation.
I have some infamatory shoulder conditions and this worried me slightly as it had not happened before. I couldn't write or hold my arm up when it happened and for some hours afterward.
Later I found out that because if the inflammation a cyst or sac of inflammatory fluid had built up, it had then gotten so big that it burst. The snap sensation was everything moving over to its place.
I can feel several more in there and in my other shoulder etc.
I hippie this helps someone and thanks for letting me get it off my chest