What a week from HELL!!!

There really is nothing scarier then seeing your child sick but to witness your infant laying motionless, with a gray tinge to his skin and absolutely unresponsive, now that is sheer terror. That was what occurred on Sunday!
Brycen had been running a fever since the morning before. No other symptoms besides the runny nose he had a week before. Saturday night the fever spiked to 105 f but came down with meds. May I just mention this whole time my little man wore his smile and giggles like nothing was wrong.
Sunday we went about our usual business, yes he still had a fever but his mood was chiper and no other symptoms had developed. That evening I was getting dinner ready, Jeff had just left for work and Brycen was fussy as was Brooklyn from our busy day of apple picking. His temp remained at 101 f, so after some meds I figured he would feel ok in a few moments. He started screaming for 30 minutes. He was absolutely inconsolable, screaming his head off for no apparent reason. It was scary, nothing could get the look of horror off his face.
He wasn't present, his eyes were open but he wasnt even seeing me or Brooklyn. I called a few people but no one was available to come and see if there was something I was missing. I didnt know what to do, I was panicking. My gut was screaming at me but my mind was telling me not to overreact. As I carried his flailing body, trying everything I could to calm him, he started jutting up his legs and making this low gravely growl over and over again. I was freaking out by this point and feeling completely helpless. Brooklyn kept singing to him to get him to calm down. Very cute of her now that I can recapture the moment.
After what semed like hours of screaming I laid Brycen down on the ottamon to see if I could find anything visible that could be causing the screaming and he started to calm. His whole body went limp and his color drained. He looked like he was sleeping but I could'nt arouse him.
He wasn't responding to Brooklyn or I and I did everything from singing, pinching shaking everything but he wouldnt respond yet he was still breathing very slowly. I was beyond scared and I was so scared I couldnt even make a descision as to what to do. I kept second guessing myself, afraid to call 911 in case he was just sleeping deeply.
Finally I called 911 after 20 minutes of a completely non responsive baby. Looking back I remember Brooklyn kept telling me it's ok mom, dont be frusterated (that's normally the emotion I tell her I am) She was kissing me and being so strong for me as her mommy crumbled in fear at her littlest babies state. So scary and sad all together. The paramedics arrived within minutes and after a heel prick and an IV he started screaming. After a long night at CHEO with no answers and a whole lot of meds Brycen is getting better. The episode leaves many questions and little answers but I am thanking my lucky stars that my little man is alright. What a scare and I feel for any parent who has or will experience such a scary moment.