Future Self

[jafar]

1.  I have access and always have had access to my future self?

If the word "Future Self" here means "Over Self", "Higher Self", "Atman", "Holy Spirit", "Ruach Ha Kodesh", "Ruhul Kudush".
Then yes, you always have access.

Yet there's a 'feature' that you can choose, out of your own free will, to "block that access".
You will always observe your own will, so when you choose to "going Rambo" by being 'separated' through 'blocking the access', you will definitely granted yourself that feature / luxury.

That 'block feature' however will not block the 'read only access' from your 'greater self' to your 'lesser self', because your 'lesser self' is streaming / writing the experience to the same set of memory that your 'greater self' has access to.

In short the block feature will not work to 'block' any knowledge / information / experience collected from your 'lesser self' to the 'greater self'. Your 'greater self' might not send data / information to 'your lesser self' but your 'greater self' will always know your 'lesser self' life experience in every details.

2.  My future self has actually been with me in those moments of my deepest, darkest experiences in my present life?

Yes you're always with you, including during your deepest darkest experience in your current life.

3.  My future and past incarnates are all happening simultaneously?

In a way yes..

As a metaphor, imagine the higher self as the "Novel Author" and the lesser selves are all the characters (and events) inside the novel. The author can choose to jump around towards any point of space and time in that novel. As the story inside novel has it's own context of space and time.