I was gonna ask a question about a dream I had, and since it doesn't have "other" anymore, I had to write health. (?) :/
go to your profile - click on your experiences on the side menu and then a menu will appear on the page with a rolling list of experiences and people joining them, above that menu is a box with the word I in it, thats where you create your own experience. It took me ages to work it out the other day!!!
possibly i nevcer tried on my mobile, and this was yesterday anyway, maybe they changed it since then :(
You just add the experience you wrote, and if it doesnt exist it will ask if you want to make it exist.