New runner/Patellar Tendonitis/Park Run

[AliceScarlett]

I was so excited about doing my first park run tomorrow, but I think I've got patellar tendonitis.
runnersconnect.net/running-injury-prevention/patellar-tendonitis-running/

Obviously Dr Google has diagnosed so I might be way off, but it hurts behind my knee and it's a sharp pain that gets worse when I run on it.

I've been running for 16 days (total couch potato 2 weeks ago) yesterday I ran 4.5k. I think I've just overdone it haven't I?

It's SO annoying, I'm amazed I can run, I don't want to give up or get out of routine or break myself.

Going to spend stupid money on running shoes tomorrow because I'm currently in old trainers.

Anything else I can do? I'm assuming I shouldn't do park run tomorrow?