You are a pitcher who throws 91. You have leverage.
I would guess you have somebody who is an advisor for you, a travel team director or coach who is/was familiar with your recruitment? Definitely check with them.
The MLB Draft is coming up in just a few weeks. Roster spots on D1's, especially for pitchers, will come open with players who were expected on campus instead signing a pro contract. It happens every year.
There are excellent JUCO's in Florida in terms of Baseball. Hopefully you can have one of those as a Plan B while seeing where D1 roster spots open up. And contact the other D1's that offered. Let them know your situation.