It's ok to post a lot or a little, please don't feel like you have to reply in a certain way.
Would you be comfortable telling P about all your trigger dates so that maybe they can be more sensitive to your distress? If they don't know then they can't help/try to avoid making things worse. You don't have to go into detail about anything with them if you don't feel able to.
It's a shame you can't seem to access the support you need. Would you be able to get more support if you changed your GP? When would you be able to do that, I think you've said you need to stick with your current GP at the moment? Sorry if I'm wrong.