My poor baby boy!

Last night, I was at my mom's house and Alex suddenly fell forward and leaned on me and started shaking really bad. He grabbed a chunk of my hair and wouldn't let go, I could not get his hands to unclench. His eyes were rolling into the back of his head and he got really pale. I called 911 and THEY PUT ME ON HOLD!?!?! They finally answered and started asking a million and one questions and my dad was walking out the door with Alex saying "We're taking him to the hospital ourselves, we can't wait" so I told the woman "We're driving him to the ER, bye." Then we got there and he threw up three times all over the place (including all over me of course) and he was running a really high fever. The ER doc said he thinks it's just something called a febiril seizure where he has a seizure caused by a high fever which would have been caused by something else. He sent us home and said to see Alex's regular Dr today. We went to his regular dr this morning and because of Alex's prematurity, they want to make sure there are no other underlying issues so they're having us get an MRI and EEG done but not till July 7th cuz that's the soonest they have available. So now we just wait and see what happens. He's acting ok today but he's really tired and still has a fever :0(