I have had a notification sitting in the drop down menu [ top right under 'account' ] for several days now, which, when selected, takes me to a page which has no notifications on it.
Also I cannot see find my own posts, this board/forum is really user unfriendly.
It seems that notifications in the community don't appear, so as an alternative, I should suggest, if you like to get them all by email in future, go to 'Account', Settings', then 'Notifications Settings', then tick all Email boxes, then click on 'update changes' button, in order to get it all by email directly to your email account.
Secondly, to view all your own posts you have posted, just place cursor over your username on top left of each of your posts, and you will see a drop down menu appear automatically, then again place your cursor over the 2nd box of the drop down menu entitled 'view forum posts' and you will see a complete chronological list of all your posts in time order.
Hope this helps😉