Hi Brandon
Great to hear from you!
Squash is a great sport - used to play it loads when I worked in the UK - but it certainly upset my knees. I can fully empathise with you regarding your pain - as a Sports Physician I have probably experienced most injuries myself and not too long ago managed to injure my own knee too. Needless to say I feel you frustration.
I agree with Dr Sean that you need an assessment and certainly seeing one of my surgical colleagues is an option. The positives of your story are that you are able to walk and it sounds like your pain is mainly with stairs. Important symptoms to consider further are whether your knee feels like it is "giving way" or "locking" i.e. getting stuck.
With many problems, symptoms can improve and with minimal intervention you can be back to normal activities. Patients I see in clinic with knee pain usually benefit from rehabilitation with my physiotherapy colleagues and sometimes I send them for a gait analysis - depending on their presentation.
Your next step should be a thorough clinical assessment. If it looks like you need imaging, such as an MRI, then it would be good to consider this, but if not, starting early rehabilitation is important.
Good luck with your knee and if you have further questions, please do not hesitate to ask.
BW
Dr Dinesh
