Sorry if this is in the wrong place, but since it contained some spoilers, i wasn't sure where else to put it.
So, I've gone through and decided to side with the Institution, which in turn had me kill the leaders of the railroad, and destroy the brotherhoods giant ship, effectively destroying those two quest lines. I ended up completing the quests "institutionalized", and "nuclear family", which made me watch my son die of old age, and i assume the role as Director of the Institution. So was that it? Did i beat the main story? I'm asking this because i never got a roll credits, or a type of epilogue, i guess. I wasn't given another main story quest after that, just side quests.
The Minutemen are still alive and thriving, and i know i can go through them to get to the end of the main story, but i cant seem to get any main missions out of Preston Garvey. The last 'main' mission i completed for the Minutemen was "Inside Job". I believe the next is called "Form Ranks". I read somewhere that i need to have at least 8 settlements established (which i do), and that i need to not be allied with the Institution (no longer be in good standing). Now, i tried going into the Institution and killing everyone, escaping, and hoping something new would pop up saying i wasn't allied with them, and could get that quest out of Garvey. Nothing new happened, so i reloaded an old save point, and now I'm not sure what to do to try and move forward with the main quest line. Any thoughts?