Hi Ben,
From what you are saying this is not a new problem and it has been getting worse so in essence you are having acute on chronic episodes of your symptoms. My first advice would be go to see a Physio and have your elbow looked at. The elbow is a difficult joint to assess and treat due to the structures eg nerves and tendons, pluss there may be an element of referred pain from the neck. If you have a muscle imbalance around the elbow and you continue to play, it may be that there is a positional fault at the joint and this will need to be rectified by a Physiotherapist. It seems to me that without an assessment then to just throw you exercises may be more of a hindrance than a help. It really needs to be looked at by a Physio, this is your sport and you seem very dedicated so it would be in your best interests to have an assessment. I would advise to limit your playing eg 1 hour per day or until symptoms appear, if this is not possible then you may be doing more harm than good.

Good Luck

Lee...