I'm gonna be real with you, I went to open my forge install and replicate the issue because i've been playing on it on an unmodded load because it was letting me in on non-forge launches.
And then when I tried to use forge it immediately let me in with no issue, optifine fully loaded. I have no clue what just happened but thank you for trying to help! Problem solved, I appreciate you taking the time out of your day to try to assist!