Possible drug induced time travel movie? (I don't think it's 'Synchronic')

In the movie there was a character who kept showing up in flashbacks or memories from different times in the protagonists life and he would only say one word at a time. Later it’s revealed he was forming sentences over the protagonists lifetime and it’s played in the correct sequence.
The one in the flashbacks was being treated as a prophet of sorts and I think it was a drug causing the weird time travelly-ness.
There was another female character trying to get the protagonist to remember an alternate life or something. That’s all I can remember and I want to watch it again.

Appreciate the help!

I finally found it after hours of searching, only minutes after making this post. It was ‘Flashback’ or ‘The Education of Fredrick Fitzell’