So my little one is sick and I have never had to deal with a sick baby before. My two oldest never…

So my little one is sick and I have never had to deal with a sick baby before. My two oldest never got sick as babies. I feel like I am going insane, he doesn't want anyone but me and my normally cheerful baby is always fussy. I hope this goes away tonight or we'll be going to the doctor tomorrow this is day 3 and we spent the first night in the hospital.