DS (3.5 months) had a really runny nose last night and was having trouble breathing. We suctioned out lots of goop but he was up most of the night. This morning he seems warm so I took his temp under his arm and it read 100 even. I called the ped 'on call' but they haven't called back - that was like 2 hours ago! I'm not happy about that. This is ds's first time being at all sick. Is that a temp I should worry about? He is eating okay but is pretty sleepy (maybe from being up all night). What should I do??