It looks like you are doing a great job of monitoring yourself.
If you need some more "tangible" type of evidence for your GP, you might try a mood chart and since the episodes come on rather sporadically, maybe use a chart which encourages you to rate/note your mood more than twice a day?
Just one option for presenting info to your GP and to have for a psychiatrist once you are able to see one.
Are you sleeping okay?
When do you take your medication?
Are you being treated for hypothyroidism?
Keep up the good work!

WC